是否可以在安卓中单击图像时显示吐司消息或弹出窗口?

Question

我正在创建一个应用程序，我想在其中吐出一条消息或在图像单击时显示弹出窗口。

注意：我不想使用ImageButton，ImageView或Button显示Toast或弹出窗口。

请用代码回答

法典：

我想在myImage对象上发生事件

私人地图;

private ImageButton button;
private SupportMapFragment mapFragment = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.mapfragment);
boolean success = com.here.android.mpa.common.MapSettings.setIsolatedDiskCacheRootPath(
getApplicationContext().getExternalFilesDir(null) + File.separator + ".here-maps",
"");
mapFragment.init(new OnEngineInitListener() {
@Override
public void onEngineInitializationCompleted(
OnEngineInitListener.Error error) {
if (error == OnEngineInitListener.Error.NONE) {
// now the map is ready to be used
map = mapFragment.getMap();
//  map.setZoomLevel(12);
// ...
com.here.android.mpa.common.Image myImage =
new com.here.android.mpa.common.Image();

button = new ImageButton(MainActivity.this);
button.setImageResource(R.drawable.ic_action_name);
try {
myImage.setImageResource(R.drawable.ic_action_name);
} catch (IOException e) {
e.printStackTrace();
}

map.addMapOverlay(
new MapOverlay(button,
new GeoCoordinate(49.203076, -123.133849, 0.0)));

// Set the map center to Vancouver, Canada.
map.setCenter(new GeoCoordinate(49.203076, -123.133849), Map.Animation.NONE);

button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),"Harish",Toast.LENGTH_LONG).show();
}
});

创建自定义标记图像

} else {
System.out.println("ERROR: Cannot initialize SupportMapFragment");
}
}
});
}

Answer 1

是的，你可以做到：

yourImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(GroupProfile.this, "Your Toast here", Toast.LENGTH_SHORT).show();
}
});

Answer 2

您可以首先使用 onTouch 事件检测您是否触摸了图像，并使用 toast 方法显示消息。 它看起来像这样。

public boolean onTouchEvent(MotionEvent event){
int action = event.getAction();
int x = event.getX()  
int y = event.getY();
switch(action){
case MotionEvent.ACTION_DOWN:
if (x >= xOfYourBitmap && x < (xOfYourBitmap + yourBitmap.getWidth())
&& y >= yOfYourBitmap && y < (yOfYourBitmap + yourBitmap.getHeight())) {
//tada, if this is true, you've started your click inside your bitmap
Toast.makeText(getActivity(), "This is my Toast message!",Toast.LENGTH_LONG).show();
}
break;
}
}

Answer 3

如果你使用ImageView而不是android.media.image，你可以这样做。没有像 android.media.image 的 OnClickListener() 这样的方法...

另一种解决方案是遵循Chetan Mehara给出的答案 https://stackoverflow.com/users/1725131/chetan-mehra

如下

public boolean onTouchEvent(MotionEvent event){
int action = event.getAction();
int x = event.getX()  
int y = event.getY();
switch(action){
case MotionEvent.ACTION_DOWN:
if (x >= xOfYourBitmap && x < (xOfYourBitmap + yourBitmap.getWidth())
&& y >= yOfYourBitmap && y < (yOfYourBitmap + yourBitmap.getHeight())) {
//tada, if this is true, you've started your click inside your bitmap
Toast.makeText(getActivity(), "This is my Toast message!",Toast.LENGTH_LONG).show();
}
break;
}
}