java Android onTouch事件未发生?
我一直在研究并努力使用我的代码,以便在触摸“幽灵”时获得一个文本视图来更新分数
这是我的第一个Android应用程序,据我所知(我在ontouch中添加了Log.w(),但从未发布日志,而且分数没有增加,甚至没有出现)ontouch(View v,MotionEvent事件)从未被调用。下面是我的代码
package com.cs461.Ian;
//TODO:Add accelerometer support
//TODO:Add Clickable ghosts
//TODO:Add camera background
/*Completed:(As of 2:30am 4/16)
* Activity launches
* Ghost appears on screen
* Ghost will randomly move around the screen
*/
import java.util.Random;
import 安卓.app.Activity;
import 安卓.content.Context;
import 安卓.graphics.Bitmap;
import 安卓.graphics.BitmapFactory;
import 安卓.graphics.Canvas;
import 安卓.os.Bundle;
import 安卓.util.Log;
import 安卓.view.MotionEvent;
import 安卓.view.SurfaceHolder;
import 安卓.view.View;
import 安卓.widget.TextView;
public class CameraActivity extends Activity{
Bitmap g;
Ghost a;
Ghost still;
SurfaceHolder mSurfaceHolder;
boolean firsttime=true;
int draw_x,draw_y,xSpeed,ySpeed,score=0;
TextView t;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.game);
a = new Ghost(getApplicationContext());
still = new Ghost(getApplicationContext());
//requestWindowFeature(Window.FEATURE_NO_TITLE);
a.Initalize(BitmapFactory.decodeResource(getResources(), R.drawable.ghost), 20, 20);
still.Initalize(BitmapFactory.decodeResource(getResources(), R.drawable.ghost), 120, 120);
t = (TextView) findViewById(R.id.t);
t.setText("TEST SCORE TO SEE IF TEXTVIEW SHOWS UP");
a.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN){
score++;
t.setText("Score: "+score);
}
return true;
}
});
still.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN){
score++;
t.setText("Score: "+score);
Log.w("CLICKED","Clicked on ghost "+score+" times");
}
return true;
}
});
setContentView(new Panel(this));
}
class Panel extends View {
public Panel(Context context) {
super(context);
}
@Override
public void onDraw(Canvas canvas) {
//g.Initalise(BitmapFactory.decodeFile("/res/drawable-hdpi/ghost.png"), 200, 150, 5, 5);;
update(canvas);
invalidate();
}
/*Places ghost on screen and bounces it around in the screen. My phone is apparently only API level 4(the most up to date is 15) so i didn't code it
*for the accelerometer yet.
*/
public void update(Canvas canvas) {
Random rand = new Random();
if(firsttime){
draw_x = Math.round(System.currentTimeMillis() % (this.getWidth()*2)) ;
draw_y = Math.round(System.currentTimeMillis() % (this.getHeight()*2)) ;
xSpeed = rand.nextInt(10);
ySpeed = rand.nextInt(10);
firsttime=false;
}
draw_x+=xSpeed;
draw_y+=ySpeed;
draw_x = Math.round(System.currentTimeMillis() % (this.getWidth()*2)) ;
draw_y = Math.round(System.currentTimeMillis() % (this.getHeight()*2)) ;
if (draw_x>this.getWidth()){
draw_x = (this.getWidth()*2)-draw_x;
xSpeed = rand.nextInt(10);
if(xSpeed >=5)
xSpeed=-xSpeed;
}
if (draw_y>this.getHeight()){
draw_y = (this.getHeight()*2)-draw_y;
ySpeed = rand.nextInt(10);
if(ySpeed >=5)
ySpeed=-ySpeed;
}
g = BitmapFactory.decodeResource(getResources(), R.drawable.ghost);
canvas.drawBitmap(g, draw_x, draw_y, null);
still.draw(canvas);
a.update(canvas);
}
}
}
忘记添加类幽灵:
package com.cs461.Ian;
import java.util.Random;
import 安卓.content.Context;
import 安卓.graphics.Bitmap;
import 安卓.graphics.Canvas;
import 安卓.graphics.Rect;
import 安卓.util.Log;
import 安卓.view.MotionEvent;
import 安卓.view.View;
public class Ghost extends View implements View.OnTouchListener{
public Ghost(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
private Bitmap mAnimation;
private int mXPos;
private int mYPos;
private Rect mSRectangle;
private int mSpriteHeight;
private int mSpriteWidth;
View v;
Rect dest;
int score = 0;
/*public Ghost() {
mSRectangle = new Rect(0,0,0,0);
mXPos = 80;
mYPos = 200;
}*/
public void Initalize(Bitmap theBitmap, int Height, int Width) {
mSRectangle = new Rect(0,0,0,0);
mXPos = 80;
mYPos = 200;
mAnimation = theBitmap;
mSpriteHeight = Height;
mSpriteWidth = Width;
mSRectangle.top = 0;
mSRectangle.bottom = mSpriteHeight;
mSRectangle.left = 0;
mSRectangle.right = mSpriteWidth;
dest = new Rect(mXPos, mYPos, mXPos + mSpriteWidth,
mYPos + mSpriteHeight);
}
public void draw(Canvas canvas) {
canvas.drawBitmap(mAnimation, mXPos, mYPos, null);
}
public void update(Canvas canvas) {
new Random();
mXPos = Math.round(System.currentTimeMillis() % (canvas.getWidth()*2)) ;
mYPos = Math.round(System.currentTimeMillis() % (canvas.getHeight()*2)) ;
if (mXPos>canvas.getWidth())
mXPos = (canvas.getWidth()*2)-mXPos;
if (mYPos>canvas.getHeight())
mYPos = (canvas.getHeight()*2)-mYPos;
draw(canvas);
}
public Rect getRect() {
return mSRectangle;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
score++;
//CameraActivity.t.setText("Score: "+CameraActivity.score);
Log.w("CLICKED","Clicked on ghost "+score+" times");
return true; //doesn't work if returns false either
}
}
# 1 楼答案
覆盖
dispatchTouchEvent(MotionEvent event)
中的Activity
以处理可能发生的所有触摸事件。返回false
将MotionEvent
传递到层次结构中的下一个视图\布局(如果它们处理事件)