[英]Can't get OnTouchListner to work
我正在嘗試創建我的第一個android游戲(在eclipse中),但似乎無法使OnTouchListner正常工作,主要是因為我不知道如何或在哪里創建它。 我試圖弄清楚有人在哪里點擊屏幕。 有人可以告訴我如何以及在何處創建OnTouchListner!
活動課:
package com.gregsapps.fallingbird;
import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class Game extends Activity implements OnTouchListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new GameView(this));
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if(event.getAction() == MotionEvent.){
System.out.println("TOUCH");
}
return false;
}
}
查看課程:
package com.gregsapps.fallingbird;
import android.R;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.view.MotionEvent;
import android.view.View;
public class GameView extends View{
private Bird bird;
private boolean runOnce = false;
private Context context;
public GameView(Context context) {
super(context);
this.context = context;
this.setDrawingCacheEnabled(true);
// TODO add setup code
}
protected void onDraw(Canvas canvas){
update(canvas);
//TODO add drawing code
this.buildDrawingCache();
//bird.canvasImage = this.getDrawingCache(true);
canvas.drawBitmap(bird.image, bird.x, bird.y, null);
System.out.println("drawing");
invalidate();
}
private void update(Canvas canvas){
//TODO add code to update stuff
if(runOnce == false){
bird = new Bird(canvas, com.gregsapps.fallingbird.R.drawable.bird, context);
runOnce = true;
}
bird.move();
}
}
您應該只能在創建的視圖上進行設置:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
GameView gv = new GameView(this);
setContentView(gv);
// set the touch listener for the view
gv.setOnTouchListener(this);
}
像這樣實現它:
public class Game extends Activity implements OnTouchListener{
GameView gv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
gv = new GameView(this);
setContentView(gv);
gv.setOnTouchListener(this);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if(event.getAction() == MotionEvent.ACTION_DOWN){
int x = event.getX();
int y = event.getY();
System.out.println("Touched view at X: " + X + " Y: " + Y );
}
return false;
}
}
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