Question

我在drawable资源中有一个jpg图像，我希望将该图像从MainActivity传递到AlarmReceiver类，然后传递到FakeRinger活动。我可以在我的应用中选择“快速拨打电话”，当用户按下该选项时，quickCall()方法会触发MainActivity中的MainActivity方法。我想从drawable中选择该图像，它应该从AlarmReceiver中的该方法传递，并将其发送到FakeRinger类，然后发送到public class MainActivity extends AppCompatActivity { public static final String LOG_TAG = "MainActivity"; ImageView imageView; EditText number, name; Button setTimeButton; ImageButton imageButton; TimePickerDialog timePicker; long selectedTimeInMillis; String enteredName, enteredNumber; private static final int SELECT_IMAGE = 100; public static final int REQUEST_CODE_PI = 1001; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); PreferenceManager.setDefaultValues(this, R.xml.settings, false); imageView = findViewById(R.id.image_view); setTimeButton = findViewById(R.id.set_time); imageButton = findViewById(R.id.place_call_button); number = findViewById(R.id.number); name = findViewById(R.id.name); imageView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); startActivityForResult(galleryIntent, SELECT_IMAGE); } }); setTimeButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { final Calendar calendar = Calendar.getInstance(); int hour = calendar.get(Calendar.HOUR_OF_DAY); int minute = calendar.get(Calendar.MINUTE); timePicker = new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() { @Override public void onTimeSet(TimePicker view, int hourOfDay, int minute) { calendar.set(Calendar.HOUR_OF_DAY, hourOfDay); calendar.set(Calendar.MINUTE, minute); calendar.set(Calendar.SECOND, 0); calendar.set(Calendar.MILLISECOND, 0); selectedTimeInMillis = calendar.getTimeInMillis(); if (hourOfDay > 12) { hourOfDay = hourOfDay - 12; } Toast.makeText(MainActivity.this, hourOfDay + ":" + minute, Toast.LENGTH_SHORT).show(); Log.v(LOG_TAG, "Selected time in millis:" + selectedTimeInMillis); } }, hour, minute, false); timePicker.show(); } }); imageButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { enteredName = name.getText().toString().trim(); enteredNumber = number.getText().toString().trim(); if (enteredNumber.isEmpty()){ Toast.makeText(MainActivity.this, "Please enter a number", Toast.LENGTH_SHORT).show(); return; } Intent intent = new Intent(MainActivity.this, AlarmReciever.class); intent.putExtra("FAKE_NAME", enteredName); intent.putExtra("FAKE_NUMBER", enteredNumber); PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), REQUEST_CODE_PI, intent, PendingIntent.FLAG_UPDATE_CURRENT); AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); if (alarmManager != null) { alarmManager.set(AlarmManager.RTC_WAKEUP, selectedTimeInMillis, pendingIntent); Toast.makeText(MainActivity.this, "Your call has been placed", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(MainActivity.this, "Error: something wrong", Toast.LENGTH_SHORT).show(); } } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.settings: Intent intent = new Intent(MainActivity.this, SettingsActivity.class); startActivity(intent); return true; case R.id.quick_call: quickCall(); return true; default: return super.onOptionsItemSelected(item); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == SELECT_IMAGE && resultCode == RESULT_OK && null != data) { Uri selectedImage = data.getData(); String[] filePathColumn = { MediaStore.Images.Media.DATA }; Cursor cursor = null; if (selectedImage != null) { cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null); } if (cursor != null) { cursor.moveToFirst(); } int columnIndex = 0; if (cursor != null) { columnIndex = cursor.getColumnIndex(filePathColumn[0]); } String picturePath = null; if (cursor != null) { picturePath = cursor.getString(columnIndex); } if (cursor != null) { cursor.close(); } imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath)); } } public void quickCall(){ enteredName = getString(R.string.quick_fake_name); enteredNumber = getString(R.string.quick_fake_number); Calendar calendar = Calendar.getInstance(); calendar.get(Calendar.HOUR_OF_DAY); calendar.get(Calendar.MINUTE); long millis = calendar.getTimeInMillis(); Intent quickCallIntent = new Intent(MainActivity.this, AlarmReciever.class); quickCallIntent.putExtra("FAKE_NAME", enteredName); quickCallIntent.putExtra("FAKE_NUMBER", enteredNumber); PendingIntent quickCallPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), REQUEST_CODE_PI, quickCallIntent, PendingIntent.FLAG_UPDATE_CURRENT); AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); if (alarmManager != null) { alarmManager.set(AlarmManager.RTC_WAKEUP, millis + 10000, quickCallPendingIntent); Toast.makeText(MainActivity.this, "Your call has been placed", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(MainActivity.this, "Error: something wrong", Toast.LENGTH_SHORT).show(); } } }活动。这是我的代码：

MainActivity：

public class AlarmReciever extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String getFakeName = intent.getStringExtra("FAKE_NAME");
        String getFakeNumber = intent.getStringExtra("FAKE_NUMBER");

        Intent fakeRinger = new Intent();
        fakeRinger.setClassName("com.example.mani.fakecall", "com.example.mani.fakecall.FakeRinger");
        fakeRinger.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        fakeRinger.putExtra("USER_FAKE_NAME", getFakeName);
        fakeRinger.putExtra("USER_FAKE_NUMBER", getFakeNumber);
        context.startActivity(fakeRinger);

        if(getFakeName != null){
            Log.v("Fake name is", getFakeName);
        }
        if(getFakeNumber != null){
            Log.v("Fake number is", getFakeNumber);
        }
    }
}

AlarmReceiver类：

public class FakeRinger extends AppCompatActivity {

    TextView displayName, displayNumber, displayCarrier;
    ImageButton alarmOffButton;
    String carrierName;
    ImageView displayImage;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fake_ringer);

        displayName = findViewById(R.id.display_name);
        displayNumber = findViewById(R.id.display_number);
        displayCarrier = findViewById(R.id.network_operator);
        displayImage = findViewById(R.id.display_image);

        TelephonyManager telephonyManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
        if (telephonyManager != null) {
            carrierName = telephonyManager.getNetworkOperatorName();
        }

        if (carrierName != null) {
            displayCarrier.setText(getResources().getString(R.string.incoming_call, carrierName));
        } else {
            displayCarrier.setText(getResources().getString(R.string.incoming_call));
        }

        Intent intent = getIntent();
        String userFakeNumber = intent.getStringExtra("USER_FAKE_NUMBER");

        displayNumber.setText(userFakeNumber);

        displayName.setText(getFakeName());

        alarmOffButton = findViewById(R.id.hang_up_call);
        alarmOffButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);
                AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
                stopService(intent);
                if (alarmManager != null) {
                    alarmManager.cancel(pendingIntent);
                }
            }
        });
    }

    private String getFakeName(){
        String contacName;
        Intent intent = getIntent();
        contacName = intent.getStringExtra("USER_FAKE_NAME");
        if (contacName.isEmpty()){
            contacName = getString(R.string.unknown_name);
        }
        return contacName;
    }
}

FakeRinger活动：

Image

我已经搜索了很多关于这个问题但仍然没有解决方案。

Answer 1

在MainActivity中

修改

String selectedImagePath; @Override protected void onCreate(Bundle savedInstanceState) { //... imageButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //... Intent intent = new Intent(MainActivity.this, AlarmReciever.class); //... intent.putExtra("SELECTED_IMAGE_PATH", selectedImagePath); // ... } } //... } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { //... if (requestCode == SELECT_IMAGE && resultCode == RESULT_OK && null != data) { Uri selectedImage = data.getData(); selectedImagePath = selectedImage.toString(); //... } } public void quickCall() { //... Intent quickCallIntent = new Intent(MainActivity.this, AlarmReciever.class); quickCallIntent.putExtra("FAKE_NAME", enteredName); quickCallIntent.putExtra("FAKE_NUMBER", enteredNumber); // ADD THIS LINE TO YOUR INTENT intent.putExtra("SELECTED_IMAGE_PATH", selectedImagePath); //... }

在AlarmReciever中

public class AlarmReciever extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { //... String selectedPath = intent.getStringExtra("SELECTED_IMAGE_PATH"); //... fakeRinger.putExtra("SELECTED_IMAGE_PATH", selectedPath); //... } }

在FakeRinger

public class FakeRinger extends AppCompatActivity { //... @Override protected void onCreate(Bundle savedInstanceState) { //... Intent intent = getIntent(); String userFakeNumber = intent.getStringExtra("USER_FAKE_NUMBER"); String path = intent.getStringExtra("SELECTED_IMAGE_PATH"); Uri imageUri = Uri.parse(path); // See: https://stackoverflow.com/a/4717740/1827254 for more information Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri); // THEN use your bitmap in any ImageView you want //... }

注意：请为变量命名以使它们有意义。例如，imageButton应命名为callButton。

Answer 2

您可以尝试这种方式添加此行您的quickCall（）方法，并给你的正确的jpg图像名称在drawable文件夹中。

 quickCallIntent.putExtra("FAKE_IMAGE", "Your Jpg Image Name");

 and Same way get in your AlrmRecevier class and pass to FakeRinger 
 Activity.
 Where do you want to show this image 
 call like this.

 imageView.setBackgrount(getIcon(" pass your jpg image name"));


  private Drawable getIcon(String icon_name) {
    if (!icon_name.equalsIgnoreCase("icon_no_icon")&& 
  !TextUtils.isEmpty(icon_name)) {
        int id = activity.getResources().getIdentifier(icon_name, 
   "drawable", activity.getPackageName());
        Drawable drawable = activity.getResources().getDrawable(id);
        return drawable;
    } else {
        return activity.getDrawable(R.drawable.screen_excision);
    }
}

如何将图像从一个活动发送到另一个活动

2 个答案: