Android Su易做图ceView 运用实例详解

package gongzi.co.cc;

import android.app.Activity;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.Su易做图ceView;
import android.view.View;
import android.view.View.OnClickListener;

public class Su易做图ceActivity extends
Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(
Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Su易做图ceView su易做图ceView = (Su易做图ceView)

findViewById(R.id.su易做图ceView1);
// su易做图ceView.setClickable(true);
su易做图ceView
.setOnClickListener(new

OnClickListener() {

     @Override
     public void onClick(
       View v) {
      // TODO Auto-generated

method stub
// Su易做图ceView su易做图ceView

= (Su易做图ceView) v;
Canvas canvas =

su易做图ceView

.getHolder()

.lockCanvas();
Paint paint = new

Paint();

paint.setColor

(Color.BLUE);
paint.setAntiAlias

(true);
      paint.setTextSize(24);
      canvas.drawText(

"loveyou",
        0, 100,
        paint);
      su易做图ceView

.getHolder()

.unlockCanvasAndPost(

canvas);

}
});
}
}

---------------2：主main
package gongzi.co.cc;

import android.app.Activity;
import android.os.Bundle;

public class Su易做图ceActivity extends
Activity {
@Override
protected void onCreate(
Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(new Click(this));
}

}

-----------Su易做图ceActivity.java
package gongzi.co.cc;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.Su易做图ceHolder;
import android.view.Su易做图ceView;

public class Click extends Su易做图ceView
implements
Su易做图ceHolder.Callback {

public Click(Context context) {
super(context);
// TODO Auto-generated constructor stub
getHolder().addCallback(this);
}

@Override
public void su易做图ceChanged(
   Su易做图ceHolder holder,
   int format, int width,
   int height) {
// TODO Auto-generated method stub

}

@Override
public void su易做图ceCreated(
Su易做图ceHolder holder) {
// TODO Auto-generated method stub

Canvas canvas = holder
    .lockCanvas();
Paint paint = new Paint();
paint.setColor(Color.BLUE);
paint.setAntiAlias(true);
paint.setTextSize(26);
canvas.drawText(
    "love you gogogogogoigogoi",
    100, 100, paint);
holder.unlockCanvasAndPost(canvas);

}

@Override
public void su易做图ceDestroyed(
Su易做图ceHolder holder) {
// TODO Auto-generated method stub

}

------------图片和轨迹球
package gongzi.co.cc;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.view.MotionEvent;
import android.view.Su易做图ceView;

public class Click extends Su易做图ceView {
float left;
float top;
Bitmap mBitmap = BitmapFactory
   .decodeResource(
     getContext()
       .getResources

(),
R.drawable.ic_launcher);

public Click(Context context) {
super(context);

// TODO Auto-generated constructor stub
}

@Override
public boolean onTouchEvent(
MotionEvent event) {
// TODO Auto-generated method stub
left = event.getX();
top = event.getY();
doDraw();
return super
.onTouchEvent(event);
}

@Override
public boolean onTrackballEvent(
MotionEvent event) {
// TODO Auto-generated method stub
left = event.getX();
top = event.getY();
doDraw();
return super
.onTrackballEvent(event);
}

private void doDraw() {
// TODO Auto-generated method stub
Canvas canvas = getHolder()
    .lockCanvas();
canvas.drawBitmap(mBitmap,
    left, top, null);
getHolder()
    .unlockCanvasAndPost(
      canvas);

}

-------------------半透明桌面
package gongzi.co.cc;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.view.MotionEvent;
import android.view.Su易做图ceHolder;
import android.view.Su易做图ceView;

public class Click extends Su易做图ceView
implements
Su易做图ceHolder.Callback {
float left;
float top;
Bitmap mBitmap = BitmapFactory
   .decodeResource(
     getContext()
       .getResources

(),
R.drawable.ic_launcher);

public Click(Context context) {
super(context);
// TODO Auto-generated constructor stub
getHolder()
.setFormat(

PixelFormat.TRANSLUCENT);
getHolder().addCallback(this);
}

@Override
public void su易做图ceChanged(
   Su易做图ceHolder holder,
   int format, int width,
   int height) {
// TODO Auto-generated method stub

}

@Override
public void su易做图ceCreated(
Su易做图ceHolder holder) {
// TODO Auto-generated method stub

doDraw();

}

@Override
public void su易做图ceDestroyed(

补充：移动开发 , Android ,