把view嵌入xml的细节

一、把View嵌入xml布局要注意设置宽高、不要用自适应、因为view默认也是填充整个屏幕。
二、如果是嵌入多个xml要注意判断View里面的对象是否为空。
三、要引用 这个构造方法    View类名(Context context,AttributeSet attr)，如TopSurFV(Context context,AttributeSet attr)；
四、事件view的touch事件在没有说明id   ,Activity是得不到点击事件的，可以通过context传入判断Activity对象。
五、在布局的时候要指明顺序、要不然会出现，只显示到view就没有的情况。用table布局的时候，系统会自动帮你识别顺序。


希望看到的朋友在此基础上，补充和修改。也请告诉我一声哦。。

MainActivity.class>>>>>>>>>>>>>>>>>>>>>>>>


package org.lun.main;


import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener{
    /** Called when the activity is first created. */
    private Button buttonok;
    private Button buttonlogin;

  
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        fullscreen();
        setContentView(R.layout.main);
        buttonok=(Button) findViewById(R.id.enter);
        buttonlogin=(Button) findViewById(R.id.login);
        buttonok.setOnClickListener(this);
        buttonlogin.setOnClickListener(this);
 
     
       
    }
    public void fullscreen(){
    requestWindowFeature(Window.FEATURE_NO_TITLE);  
         getWindow().setFlags(WindowManager.LayoutParams. FLAG_FULLSCREEN ,    
         WindowManager.LayoutParams. FLAG_FULLSCREEN);
    }
 
  
    public boolean onTouchEvent(MotionEvent event){ 
    if(event.getX()>=2&&event.getX()<30){
    if(event.getY()>2&&event.getY()<30){
   
   
    }
    }
    return true;
   
    }

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

}


}

TopSurFV.class>>>>>>>>>>>>>>>>>>>>>>

package org.lun.view;


import org.lun.main.R;

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class TopSurFV extends SurfaceView implements SurfaceHolder.Callback,Runnable{
    private Bitmap bitmap;
    private Bitmap bmptopglugin;
    private SurfaceHolder surfaceHolder;
    private static int state;
    private static int isshow=1; 
    private static final int SLEEPTIME=50;
    private boolean isflag;

    private Context context;
public TopSurFV(Context context) {
super(context);
   }
public TopSurFV(Context context,AttributeSet attr)
{

super(context,attr);
this.context=context;
surfaceHolder=getHolder();
surfaceHolder.addCallback(this);
setFocusable(true);
inibmp();

}
public void inibmp(){
bitmap=BitmapFactory.decodeResource(getResources(), R.drawable.top);
bmptopglugin=BitmapFactory.decodeResource(getResources(), R.drawable.topplugin);
}
public void Draw(){
Canvas canvas=surfaceHolder.lockCanvas();
Paint paint=new Paint();
if(bitmap==null){
inibmp();
}
if(canvas!=null){
     canvas.drawBitmap(bitmap, 0, 0, paint);
     if(state==1){
    canvas.drawBitmap(bmptopglugin, 10, 10, paint);
     }
surfaceHolder.unlockCanvasAndPost(canvas);
}
    }
  public boolean onTouchEvent(MotionEvent event){
   
    if(event.getX()>=10&&event.getX()<40){
    if(event.getY()>10&&event.getY()<40){
       state=1;
     
   
    }
    }
    postInvalidate();
    return true;    
    }

@Override
public void surfaceCreated(SurfaceHolder holder) {
   isflag=true;
       new Thread(this).start();   

}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {


}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
isflag=false;
}

@Override
public void run() {
while (isflag)
{
try
{
Thread.sleep(SLEEPTIME);
Draw();
        state=0;
}
catch (Exception e)
{

}



}
}

}

main.xml>>>>>>>>>>>>>>>>
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:background="@drawable/homeback"
   android:stretchColumns="1">
     <org.lun.view.TopSurFV
            android:id="@+id/enterActivity"       
            android:layout_width="fill_parent"
            android:layout_height="35px"            
           />
     <TextView
           android:text="@string/welcomeenter"
           android:textStyle="bold"
           android:layout_marginTop="10px"
           android:textSize="20px"
           android:gravity="center"         
            />
    
   <TableRow    
   >
        
       <TextView
           android:text="@string/user"
           android:textStyle="bold"
           android:gravity="right"
           android:textSize="15px"         
           android:padding="3dip" />

       <EditText android:id="@+id/username"        
           android:padding="3dip"
           android:scrollHorizontally="true" />
   </TableRow>

   <TableRow >  
  
       <TextView
           android:text="@string/password"
           android:textStyle="bold"
           android:gravity="right"
           android:textSize="15px" 
           android:padding="3dip" />

       <EditText android:id="@+id/password"        
           android:password="true"
           android:padding="3dip"        
           android:scrollHorizontally="true" />
   </TableRow>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
           android:orientation="horizontal"
           android:layout_width="fill_parent"
           android:layout_height="wrap_content"          
           android:id="@+id/la2"     
           android:gravity="center"
           android:layout_marginRight="0px"
    >
  <Button android:id="@+id/enter"       
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/ok"          
           
           />
    <Button android:id="@+id/login"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="@string/login"   
        
           />

  
  
</LinearLayout>

</TableLayout>