onTouch android

开始学习Android的编程也有几天了，这几天学了好多多西。。

 

最近想着开发一个小游戏，作为一款全触屏的手机，触屏事件是不可少的。。

为了这个，我写了一段小代码来看看触屏事件到底是怎么样运作的。。。。

 

顺便给正在学习的人作个参照

 

 

 

 

package my.android.TouchTest;import android.app.Activity;import android.os.Bundle;import android.view.MotionEvent;import android.view.GestureDetector;import android.view.Window;import android.view.WindowManager;import android.view.GestureDetector.OnGestureListener;public class TouchTest extends Activity implements OnGestureListener{ /** Called when the activity is first created. */ TouchView tv; GestureDetector gd;@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.main); tv=(TouchView) findViewById(R.id.TouchView); gd=new GestureDetector(this); }@Overridepublic boolean onTouchEvent(MotionEvent me){switch(me.getAction()){case MotionEvent.ACTION_UP:tv.onUp();break;}return gd.onTouchEvent(me);}@Overridepublic boolean onDown(MotionEvent e) {tv.keyDown(e);return false;}@Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,float velocityY) {tv.onFling(velocityX,velocityY,e1,e2);// TODO Auto-generated method stubreturn false;}@Overridepublic void onLongPress(MotionEvent e) {tv.onLongPress(e);// TODO Auto-generated method stub}@Overridepublic boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,float distanceY) {tv.onScroll(distanceX,distanceY,e1);// TODO Auto-generated method stubreturn false;}@Overridepublic void onShowPress(MotionEvent e) {// TODO Auto-generated method stubtv.onShowPress(e);}@Overridepublic boolean onSingleTapUp(MotionEvent e) {// TODO Auto-generated method stubtv.onSingleTapUp(e);return false;}} 

 

 

package my.android.TouchTest;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;public class TouchView extends View{private boolean bOnDown;private boolean bOnFling;private boolean bLongPress;private boolean bOnScroll;private boolean bOnShowPress;private boolean bOnSingleTapUp;private double dX1,dY1;private double dX2,dY2;private float dX,dY;public TouchView(Context context, AttributeSet attrs) {super(context, attrs);bOnDown=false;bOnFling=false;bLongPress=false;bOnScroll=false;bOnShowPress=false;bOnSingleTapUp=false;}@Overridepublic void onDraw(Canvas canvas){Paint paint;paint=new Paint();paint.setColor(Color.RED);paint.setTextSize(15);if(bOnDown){canvas.drawText("OnDown=True", 10, 30, paint);}else{canvas.drawText("OnDown=Flase", 10, 30, paint);}if(bOnFling){canvas.drawText("OnFling=True X="+String.valueOf((int)dX1)+" Y="+String.valueOf((int)dY1), 10, 50, paint);}else{canvas.drawText("OnFling=False",10,50,paint);}if(bLongPress){canvas.drawText("LongPress=True", 10, 70, paint);}else{canvas.drawText("LongPress=False", 10, 70, paint);}if(bOnScroll){canvas.drawText("OnScroll=True X="+String.valueOf((int)dX2)+" Y="+String.valueOf((int)dY2), 10, 90, paint);}else{canvas.drawText("OnScroll=False", 10, 90, paint);}if(bOnShowPress){canvas.drawText("OnShowPress=True", 10, 110, paint);}else{canvas.drawText("OnShowPress=False", 10, 110, paint);}if(bOnSingleTapUp){canvas.drawText("bOnSingleTapUp=True",10,130,paint);}else{canvas.drawText("bOnSingleTapUp=False",10,130,paint);}canvas.drawText("X="+String.valueOf(dX)+" Y="+String.valueOf(dY),10,300,paint);canvas.drawCircle(dX, dY, (float)30, paint);canvas.drawLine(0, dY, 400, dY, paint);canvas.drawLine(dX, 0, dX, 500, paint);}public void keyDown(MotionEvent e){bOnDown=true;dX=e.getRawX();dY=e.getRawY();this.invalidate();}public void onFling(double X,double Y,MotionEvent e1,MotionEvent e2){dX1=X;dY1=Y;bOnFling=true;this.invalidate();}public void onLongPress(MotionEvent e) {// TODO Auto-generated method stubbLongPress=true;this.invalidate();}public void onScroll(float distanceX, float distanceY,MotionEvent e) {// TODO Auto-generated method stubbOnScroll=true;dX2=distanceX;dY2=distanceY;dX-=(float)dX2;//注意方向dY-=(float)dY2;this.invalidate();}public void onShowPress(MotionEvent e) {// TODO Auto-generated method stubbOnShowPress=true;this.invalidate();}public void onSingleTapUp(MotionEvent e) {// TODO Auto-generated method stubbOnSingleTapUp=true;this.invalidate();}public void onUp(){bOnDown=false;bOnFling=false;bLongPress=false;bOnScroll=false;bOnShowPress=false;bOnSingleTapUp=false;this.invalidate();}} 

 

 

 

<?xml version="1.0" encoding="utf-8"?><FrameLayout android:id="@+id/FrameLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"><my.android.TouchTest.TouchViewandroid:id="@+id/TouchView"android:layout_width="fill_parent" android:layout_height="fill_parent" /></FrameLayout>