How To Get Number From Contacts? - G1 Android Development

How do you get the number back from an implicit call to view the contacts list?
.java file
Code:
package com.grimx.MakeCall;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MakeCall extends Activity implements View.OnClickListener{
private static final int CONTACT_ACTIVITY = 100;
EditText editText;
Button callBtn;
Button contactsBtn;
Button closeBtn;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
editText = (EditText)findViewById(R.id.editText);
callBtn = (Button)findViewById(R.id.callBtn);
callBtn.setOnClickListener(this);
contactsBtn = (Button)findViewById(R.id.contactsBtn);
contactsBtn.setOnClickListener(this);
closeBtn = (Button)findViewById(R.id.closeBtn);
closeBtn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if(v.getId() == R.id.callBtn) {
String phn_number = editText.getText().toString();
if(phn_number.equals("")) {
Toast.makeText(MakeCall.this, "Please Enter A Phone Number", Toast.LENGTH_LONG).show();
}
else
{
Intent call_intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phn_number));
startActivity(call_intent);
}
}
else if(v.getId() == R.id.contactsBtn) {
Uri uri = Uri.parse("content://contacts/people");
Intent contacts_intent = new Intent(Intent.ACTION_PICK, uri);
startActivityForResult(contacts_intent, CONTACT_ACTIVITY);
}
else if(v.getId() == R.id.closeBtn) {
Toast.makeText(MakeCall.this, "Exiting MakeCall", Toast.LENGTH_LONG).show();
finish();
}
}
public void onActivityResult(int requestCode, int resultCode, Intent data){
super.onActivityResult(requestCode, resultCode, data);
switch(requestCode){
case(CONTACT_ACTIVITY): {
if(resultCode == Activity.RESULT_OK) {
Uri my_uri = data.getData();
//Uri.decode(my_uri.toString());
//want to get the number an put it in the editText
editText.setText(Uri.decode(my_uri.toString()));
}
break;
}
}
}
}

how to use a number pulled from contacts
I just figured this out myself yesterday, and it's surprisingly easy:
Code:
package org.nyquil.slydialer;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Contacts.Phones;
public class slydialer extends Activity {
private static final int PICK_CONTACT = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.main);
Intent intent = new Intent(Intent.ACTION_PICK, Phones.CONTENT_URI);
startActivityForResult(intent, PICK_CONTACT);
}
@Override
public void onActivityResult(int reqCode, int resultCode, Intent data) {
super.onActivityResult(reqCode, resultCode, data);
switch (reqCode) {
case (PICK_CONTACT) :
if (resultCode == Activity.RESULT_OK) {
Uri contactData = data.getData();
Cursor c = managedQuery(contactData, null, null, null, null);
if (c.moveToFirst()) {
String number = c.getString(c.getColumnIndexOrThrow(Phones.NUMBER));
// TODO Whatever you want to do with the selected contact name.
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel://2677593425,,,"+number));
startActivity(intent);
finish();
}
}
break;
}
}
}
It's that override to onActivityResult that's the trick. This example is only listing contacts with phone numbers, but if you replace 'Phones' with 'People' it should list them all.

ok i get a force close when i run my app now.
what i'm tring to do is click the contacts_btn and select a contact
and returns it number(putting it in the editText) and then click the
call_btn to make the call.
.java
Code:
package com.grimx.MakeCall;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Contacts.Phones;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MakeCall extends Activity implements View.OnClickListener{
private static final int CONTACT_ACTIVITY = 100;
EditText editText;
Button callBtn;
Button contactsBtn;
Button closeBtn;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
editText = (EditText)findViewById(R.id.editText);
callBtn = (Button)findViewById(R.id.callBtn);
callBtn.setOnClickListener(this);
contactsBtn = (Button)findViewById(R.id.contactsBtn);
contactsBtn.setOnClickListener(this);
closeBtn = (Button)findViewById(R.id.closeBtn);
closeBtn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if(v.getId() == R.id.callBtn) {
String phn_number = editText.getText().toString();
if(phn_number.equals("")) {
Toast.makeText(MakeCall.this, "Please Enter A Phone Number", Toast.LENGTH_LONG).show();
}
else
{
Intent call_intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phn_number));
startActivity(call_intent);
}
}
else if(v.getId() == R.id.contactsBtn) {
Uri uri = Uri.parse("content://contacts/people");
Intent contacts_intent = new Intent(Intent.ACTION_PICK, uri);
startActivityForResult(contacts_intent, CONTACT_ACTIVITY);
}
else if(v.getId() == R.id.closeBtn) {
Toast.makeText(MakeCall.this, "Exiting MakeCall", Toast.LENGTH_LONG).show();
finish();
}
}
public void onActivityResult(int requestCode, int resultCode, Intent data){
super.onActivityResult(requestCode, resultCode, data);
switch(requestCode){
case(CONTACT_ACTIVITY): {
if(resultCode == Activity.RESULT_OK) {
Uri contact_data = data.getData();
Cursor c = managedQuery(contact_data, null, null, null, null);
if(c.moveToFirst()){
String number = c.getString(c.getColumnIndexOrThrow(Phones.NUMBER));
editText.setText("tel:" + number);
}
}
break;
}
}
}
}

the force close happens on the return from selecting a contact.

You could atleast say your rom and phone model.

HTC G1 Black, CyanogenMod-4.2.1.1

grimx said:
HTC G1 Black, CyanogenMod-4.2.1.1
Click to expand...
Click to collapse
Did you upgrade from a older version or do a full wipe?
Did you use HTC ADP rom or the Base rom from enom?

HTC G1 Black, CyanogenMod-4.2.11.1

sorry about that mix up

Heres my AndroidManifest.xml, if it helps
Code:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.grimx.MakeCall"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".MakeCall"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="3" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.CALL_PRIVILEGED" />
</manifest>

Ok problem solved.
I forgot to add the permission :
<uses-permission android:name="android.permission.READ_CONTACTS" />
to my AndroidManifest.xml file.

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Code:
import java.io.File;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
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Error while uploading image in my Android App.

I made Instagram type application in Android Studio, but whenever I try to upload image in my app, it uploads to my profile picture. I checked my intents and they are really perfect. First file is GalleryFragment.java in which we will select the photo which we want to upload and Second file is NextActivity.java which is used to Share the image to profile. But in GalleryFragment.java I have intent getActivity() to NextActivity.java and AccountSettingsActivity.java in which we can change out profile picture. But whenever I click on Next it doesn't take me to NextActivity.java but to the AccountSettingsActivity.java and updates my profile picture. If there is Firebase error so tell me. And the same issue is occurred when I try to upload photo from camera inside the application and it doesn't do anything. I have posted 3 files.
GalleryFragment.java
Code:
package darthvader.com.pictagram.Share;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Environment;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.Spinner;
import android.widget.TextView;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.listener.ImageLoadingListener;
import java.util.ArrayList;
import java.util.Objects;
import darthvader.com.pictagram.Profile.AccountSettingsActivity;
import darthvader.com.pictagram.R;
import darthvader.com.pictagram.Utils.FilePaths;
import darthvader.com.pictagram.Utils.FileSearch;
import darthvader.com.pictagram.Utils.GridImageAdapter;
public class GalleryFragment extends Fragment {
private static final String TAG = "GalleryFragment";
//constants
private static final int NUM_GRID_COLUMNS = 3;
//widgets
private GridView gridView;
private ImageView galleryImage;
private ProgressBar mProgressBar;
private Spinner directorySpinner;
//vars
private ArrayList<String> directories;
private String mAppend = "file:/";
private String mSelectedImage;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_gallery, container, false);
galleryImage = view.findViewById(R.id.galleryImageView);
gridView = view.findViewById(R.id.gridView);
directorySpinner = view.findViewById(R.id.spinnerDirectory);
mProgressBar = view.findViewById(R.id.progressBar);
mProgressBar.setVisibility(View.GONE);
directories = new ArrayList<>();
Log.d(TAG, "onCreateView: started.");
ImageView shareClose = view.findViewById(R.id.ivCloseShare);
shareClose.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: closing the gallery fragment.");
Objects.requireNonNull(getActivity()).finish();
}
});
TextView nextScreen = view.findViewById(R.id.tvNext);
nextScreen.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: navigating to the final share screen.");
if(isRootTask()){
Intent intent = new Intent(getActivity(), NextActivity.class);
intent.putExtra(getString(R.string.selected_image), mSelectedImage);
startActivity(intent);
}else{
Intent intent = new Intent(getActivity(), AccountSettingsActivity.class);
intent.putExtra(getString(R.string.selected_image), mSelectedImage);
intent.putExtra(getString(R.string.return_to_fragment), getString(R.string.edit_profile_fragment));
startActivity(intent);
getActivity().finish();
}
}
});
init();
return view;
}
private boolean isRootTask(){
return ((ShareActivity) getActivity()).getTask() == 0;
}
private void init(){
FilePaths filePaths = new FilePaths();
//check for other folders indide "/storage/emulated/0/pictures"
if (FileSearch.getDirectoryPaths(filePaths.PICTURES) != null) {
directories = FileSearch.getDirectoryPaths(filePaths.PICTURES);
}
directories.add(filePaths.CAMERA);
ArrayList<String> directoryNames = new ArrayList<>();
for (int i = 0; i < directories.size(); i++) {
Log.d(TAG, "init: directory: " + directories.get(i));
int index = directories.get(i).lastIndexOf("/");
String string = directories.get(i).substring(index);
directoryNames.add(string);
}
ArrayAdapter<String> adapter = new ArrayAdapter<>(Objects.requireNonNull(getActivity()),
android.R.layout.simple_spinner_item, directoryNames);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
directorySpinner.setAdapter(adapter);
directorySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Log.d(TAG, "onItemClick: selected: " + directories.get(position));
//setup our image grid for the directory chosen
setupGridView(directories.get(position));
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
private void setupGridView(String selectedDirectory){
Log.d(TAG, "setupGridView: directory chosen: " + selectedDirectory);
final ArrayList<String> imgURLs = FileSearch.getFilePaths(selectedDirectory);
//set the grid column width
int gridWidth = getResources().getDisplayMetrics().widthPixels;
int imageWidth = gridWidth/NUM_GRID_COLUMNS;
gridView.setColumnWidth(imageWidth);
//use the grid adapter to adapter the images to gridview
GridImageAdapter adapter = new GridImageAdapter(getActivity(), R.layout.layout_grid_imageview, mAppend, imgURLs);
gridView.setAdapter(adapter);
//set the first image to be displayed when the activity fragment view is inflated
try{
setImage(imgURLs.get(0), galleryImage, mAppend);
mSelectedImage = imgURLs.get(0);
}catch (ArrayIndexOutOfBoundsException e){
Log.e(TAG, "setupGridView: ArrayIndexOutOfBoundsException: " +e.getMessage() );
}
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Log.d(TAG, "onItemClick: selected an image: " + imgURLs.get(position));
setImage(imgURLs.get(position), galleryImage, mAppend);
mSelectedImage = imgURLs.get(position);
}
});
}
private void setImage(String imgURL, ImageView image, String append){
Log.d(TAG, "setImage: setting image");
ImageLoader imageLoader = ImageLoader.getInstance();
imageLoader.displayImage(append + imgURL, image, new ImageLoadingListener() {
@Override
public void onLoadingStarted(String imageUri, View view) {
mProgressBar.setVisibility(View.VISIBLE);
}
@Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
mProgressBar.setVisibility(View.INVISIBLE);
}
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
mProgressBar.setVisibility(View.INVISIBLE);
}
@Override
public void onLoadingCancelled(String imageUri, View view) {
mProgressBar.setVisibility(View.INVISIBLE);
}
});
}
}
NextActivity.java
Code:
package darthvader.com.pictagram.Share;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;
import darthvader.com.pictagram.R;
import darthvader.com.pictagram.Utils.FirebaseMethods;
import darthvader.com.pictagram.Utils.UniversalImageLoader;
import darthvader.com.pictagram.models.User;
public class NextActivity extends AppCompatActivity {
private static final String TAG = "NextActivity";
//firebase
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
private FirebaseDatabase mFirebaseDatabase;
private DatabaseReference myRef;
private FirebaseMethods mFirebaseMethods;
//widgets
private EditText mCaption;
//vars
private String mAppend = "file:/";
private int imageCount = 0;
private String imgUrl;
private Bitmap bitmap;
private Intent intent;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_next);
mFirebaseMethods = new FirebaseMethods(NextActivity.this);
mCaption = findViewById(R.id.caption);
setupFirebaseAuth();
ImageView backArrow = findViewById(R.id.ivBackArrow);
backArrow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: closing the activity");
finish();
}
});
TextView share = findViewById(R.id.tvShare);
share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: navigating to the final share screen.");
//upload the image to firebase
Toast.makeText(NextActivity.this, "Attempting to upload new photo", Toast.LENGTH_SHORT).show();
String caption = mCaption.getText().toString();
if(intent.hasExtra(getString(R.string.selected_image))){
imgUrl = intent.getStringExtra(getString(R.string.selected_image));
mFirebaseMethods.uploadNewPhoto(getString(R.string.new_photo), caption, imageCount, imgUrl,null);
}
else if(intent.hasExtra(getString(R.string.selected_bitmap))){
bitmap = intent.getParcelableExtra(getString(R.string.selected_bitmap));
mFirebaseMethods.uploadNewPhoto(getString(R.string.new_photo), caption, imageCount, null,bitmap);
}
}
});
setImage();
}
private void someMethod(){
/*
Step 1)
Create a data model for Photos
Step 2)
Add properties to the Photo Objects (caption, date, imageUrl, photo_id, tags, user_id)
Step 3)
Count the number of photos that the user already has.
Step 4)
a) Upload the photo to Firebase Storage
b) insert into 'photos' node
c) insert into 'user_photos' node
*/
}
/**
* gets the image url from the incoming intent and displays the chosen image
*/
private void setImage(){
intent = getIntent();
ImageView image = findViewById(R.id.imageShare);
if(intent.hasExtra(getString(R.string.selected_image))){
imgUrl = intent.getStringExtra(getString(R.string.selected_image));
Log.d(TAG, "setImage: got new image url: " + imgUrl);
UniversalImageLoader.setImage(imgUrl, image, null, mAppend);
}
else if(intent.hasExtra(getString(R.string.selected_bitmap))){
bitmap = intent.getParcelableExtra(getString(R.string.selected_bitmap));
Log.d(TAG, "setImage: got new bitmap");
image.setImageBitmap(bitmap);
}
}
/*
------------------------------------ Firebase ---------------------------------------------
*/
/**
* Setup the firebase auth object
*/
private void setupFirebaseAuth(){
Log.d(TAG, "setupFirebaseAuth: setting up firebase auth.");
mAuth = FirebaseAuth.getInstance();
mFirebaseDatabase = FirebaseDatabase.getInstance();
myRef = mFirebaseDatabase.getReference();
Log.d(TAG, "onDataChange: image count: " + imageCount);
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
// User is signed in
Log.d(TAG, "onAuthStateChanged:signed_in:" + user.getUid());
} else {
// User is signed out
Log.d(TAG, "onAuthStateChanged:signed_out");
}
// ...
}
};
myRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
imageCount = mFirebaseMethods.getImageCount(dataSnapshot);
Log.d(TAG, "onDataChange: image count: " + imageCount);
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
@Override
public void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
@Override
public void onStop() {
super.onStop();
if (mAuthListener != null) {
mAuth.removeAuthStateListener(mAuthListener);
}
}
}
PhotoFragment.java
Code:
package darthvader.com.pictagram.Share;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import java.util.Objects;
import darthvader.com.pictagram.Profile.AccountSettingsActivity;
import darthvader.com.pictagram.R;
import darthvader.com.pictagram.Utils.Permissions;
public class PhotoFragment extends Fragment {
private static final String TAG = "PhotoFragment";
//constant
private static final int PHOTO_FRAGMENT_NUM = 1;
private static final int GALLERY_FRAGMENT_NUM = 2;
private static final int CAMERA_REQUEST_CODE = 5;
@Nullable
@Override
public View onCreateView(final LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_photo, container, false);
Log.d(TAG, "onCreateView: started.");
Button btnLaunchCamera = (Button) view.findViewById(R.id.btnLaunchCamera);
btnLaunchCamera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: launching camera.");
if(((ShareActivity)getActivity()).getCurrentTabNumber() == PHOTO_FRAGMENT_NUM){
if(((ShareActivity)getActivity()).checkPermissions(Permissions.CAMERA_PERMISSION[0])){
Log.d(TAG, "onClick: starting camera");
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST_CODE);
}else{
Intent intent = new Intent(getActivity(), ShareActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
}
}
}
});
return view;
}
private boolean isRootTask(){
if(((ShareActivity)getActivity()).getTask() == 0){
return true;
}
else{
return false;
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == CAMERA_REQUEST_CODE){
Log.d(TAG, "onActivityResult: done taking a photo.");
Log.d(TAG, "onActivityResult: attempting to navigate to final share screen.");
Bitmap bitmap;
bitmap = (Bitmap) Objects.requireNonNull(data.getExtras()).get("data");
if(isRootTask()){
try{
Log.d(TAG, "onActivityResult: received new bitmap from camera: " + bitmap);
Intent intent = new Intent(getActivity(), NextActivity.class);
intent.putExtra(getString(R.string.selected_bitmap), bitmap);
startActivity(intent);
}catch (NullPointerException e){
Log.d(TAG, "onActivityResult: NullPointerException: " + e.getMessage());
}
}else{
try{
Log.d(TAG, "onActivityResult: received new bitmap from camera: " + bitmap);
Intent intent = new Intent(getActivity(), AccountSettingsActivity.class);
intent.putExtra(getString(R.string.selected_bitmap), bitmap);
intent.putExtra(getString(R.string.return_to_fragment), getString(R.string.edit_profile_fragment));
startActivity(intent);
getActivity().finish();
}catch (NullPointerException e){
Log.d(TAG, "onActivityResult: NullPointerException: " + e.getMessage());
}
}
}
}
}

Draw shape on touch

In the following code drawing using DrawView works for me. But I want to draw a shape on touching the canvas. MyView is supposed to do that, but how to get it working?
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.View;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
public class MainActivity extends Activity {
DrawView drawView;
MyView myView;
@override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
drawView = new DrawView(this);
drawView.setBackgroundColor(Color.WHITE);
setContentView(drawView);
myView = new MyView(this);
myView.setBackgroundColor(Color.WHITE);
setContentView(drawView);
}
class DrawView extends View {
Paint paint = new Paint();
public DrawView(Context context) {
super(context);
paint.setColor(Color.BLACK);
}
@override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawLine(10, 20, 30, 40, paint);
canvas.drawLine(20, 10, 50, 20, paint);
}
}
class MyView extends View {
private float xDown = 0,yDown = 0, xUp = 0, yUp = 0;
Paint mPaint;
boolean touched = false;
public MyView(Context context) {
super(context);
init(context);
}
public MyView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public MyView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
private void init(Context context) {
mPaint = new Paint();
mPaint.setColor(Color.BLUE);
mPaint.setStyle(Paint.Style.STROKE);
}
@override
protected void onDraw (Canvas canvas) {
canvas.drawColor(Color.TRANSPARENT);
if(touched) {
canvas.drawRect(xDown, yDown, xUp, yUp, mPaint);
}
}
@override
public boolean onTouchEvent (MotionEvent event) {
switch (event.getAction()){
case MotionEvent.ACTION_DOWN:
xDown = event.getX();
yDown = event.getY();
xUp = 0;
yUp = 0;
break;
case MotionEvent.ACTION_MOVE:
xUp = event.getX();
yUp = event.getY();
touched = true;
break;
case MotionEvent.ACTION_UP:
xUp = event.getX();
yUp = event.getY();
touched = true;
break;
}
invalidate();
return true;
}
}
}
The second
BjornAndroid said:
setContentView(drawView);
Click to expand...
Click to collapse
had to be
setContentView(myView);

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