I'm new to android development. Is it possible for a view (with a particular layout) to "appear" at the location where the user "touches"? If so, how? Like the idea of right-clicking on your computer - a menu pops down wherever you right-click and when you navigate away, it disappears.
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I've this code:
Java: (http://nopaste.me/4449 )
package com.patrick.games.whackgroundhog; 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.MotionEvent; import android.view.View;
public class Game extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); setContentView(new Ground(this));
} class Ground extends View { public Ground(Context context) { super(context);
} public void onDraw(Canvas canvas) { canvas.drawColor(Color.BLACK);
} @Override public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
//TODO: draw the circle } return true;
} } }
I'm developing an Android application. I'm very new on it. I have the following classes:
class CustomGLSurfaceView extends GLSurfaceView
class CustomRenderer implements GLSurfaceView.Renderer
CustomGLSurfaceView uses CustomRenderer to render a cube on onDrawFrame method.
I've added an onTouchEvent(MotionEvent event) on CustomGLSurfaceView to manage touch events:
class CustomGLSurfaceView extends GLSurfaceView {
// For touch inputs - previous touch (x, y)
private float previousX; private float previousY;
private CustomRenderer myRenderer; public CustomGLSurfaceView(Context context) {
super(context); myRenderer = new CustomRenderer(); setRenderer(myRenderer);
} @Override public boolean onTouchEvent(MotionEvent event) {
float currentX = event.getX(); float currentY = event.getY();
switch (event.getAction()) { case MotionEvent.ACTION_MOVE:
myRenderer.handleMovement(currentY, currentY, previousX, previousY);
} // Save current x, y
previousX = currentX; previousY = currentY;
return true; // Event handled } }
May I have to modify onDrawFrame to draw something new or to rotate the cube? I thing I must do it on handleMovement.
Here is the problem, I am building an application and have multiple images that need to switch when the user touches the screen, doesn't matter where the users touches. The press the screen and the images switch randomly. I purchased the ebook "Professional Android Application Development" and have torn though it. I am stumped. I'm thoroughly confused at this point. Any ideas on where I can go or how I can accomplish this?
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However, I haven't yet managed to adjust the dispatchTouchEvent code to counter the map rotation effect for the user touches (right now when the map is rotated 90 degrees a user's horizontal sweep will move the map vertically etc). The sample code only offers the teaser:
CODE:..........
And while I am at it - Is it still possible to position the zoom controls separately, so that they do NOT rotate when the map rotates? I read that the getZoomControls() is deprecated.
I am developing a game in android and i want to capture screen coordinates of a view(ImageView) which is embedded in frame.
Hierarchy is <LinearLayout android android:layout_height="fill_parent" android:layout_width="fill_parent" > <RelativeLayout android:layout_height=fill_parent" android:layout_width="fill_parent" > <FrameLayout android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/frame14"></ FrameLayout> </RelativeLayout> </LinearLayout>
At run time i am attaching two image views for frame layout.I wanted to capture screen coordinates of frame layout.But Couldnt do it.if i say
(FrameLayout) f=(FrameLayout)findViewById(R.id.frame14); int[] loc = new int[2]; f.getLocationOnScreen(loc); System.out.println(loc[0]); System.out.println(loc[1]);
I get Null Pointer Exception for getLocationOnScreen() method.
If I try to get f.getLeft() and f.getRight() they return as 0 coordinates.
Can anyone please tell me how to find location on screen of a view.
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Work for any device as long as it has either a GPS or a Network Location provider.
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View 5 Replies View RelatedI want to detect when a user taps anywhere in a view in my Android application. My code looks like this:
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// ...
linearLayout.setOnTouchListener(this);
// ...
public boolean onTouch(View v, MotionEvent event) {
Toast.makeText(this, "Touch!", 1000);
if (event.getAction() == MotionEvent.ACTION_DOWN) {
Toast.makeText(this, "Down!", 1000);
return true;
}
return false;
}
but when I click on the view, I don't get Toast! Do touch events work in the emulator -- or have I got something wrong in my code?
I have a user's twitter handle. Right now I'm opening it through a web page like:
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Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
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I have an imageview and when clicked, calls OnClickListener.onClick(View v). How do I get the exact point/coordinate that the user clicked?
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