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 Android教程網 >> Android技術 >> 關於Android編程 >> Android開發（14）-- 多線程中實現利用自定義控件繪制小球並完成小球自動下落的功能

Android開發（14）-- 多線程中實現利用自定義控件繪制小球並完成小球自動下落的功能

編輯：關於Android編程

1、布局界面

[html]
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".GameActivity" >


<www.csdn.net.tetris.view.GameView
android:id="@+id/gameview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

<Button
android:id="@+id/btn_left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/gameview"
android:layout_alignParentBottom="true"
android:text="@string/btn_text" />

<Button
android:id="@+id/btn_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/gameview"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
android:text="@string/btn_right" />

 

</RelativeLayout>
[html]
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context=".GameActivity" > 
 
 
    <www.csdn.net.tetris.view.GameView  
        android:id="@+id/gameview" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"/> 
 
    <Button 
        android:id="@+id/btn_left" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignLeft="@+id/gameview" 
        android:layout_alignParentBottom="true" 
        android:text="@string/btn_text" /> 
 
    <Button 
        android:id="@+id/btn_right" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignBottom="@+id/gameview" 
        android:layout_centerHorizontal="true" 
        android:layout_alignParentBottom="true" 
        android:text="@string/btn_right" /> 
 
     
 
</RelativeLayout> 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".GameActivity" >


    <www.csdn.net.tetris.view.GameView
        android:id="@+id/gameview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:id="@+id/btn_left"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/gameview"
        android:layout_alignParentBottom="true"
        android:text="@string/btn_text" />

    <Button
        android:id="@+id/btn_right"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/gameview"
        android:layout_centerHorizontal="true"
        android:layout_alignParentBottom="true"
        android:text="@string/btn_right" />

   

</RelativeLayout>

 

2、封裝的一個繪制的圖的類

[java]
package www.csdn.net.tetris.domain;

import www.csdn.net.tetris.view.GameView;

public class Block {

private int x=20,y=20;


public GameView gameView;
public Block(GameView gameView){
this.gameView=gameView;
}

 

//向左移動
public void moveLeft(){
x-=10;
gameView.invalidate();
}

//向右移動
public void moveRight(){
x+=10;
gameView.invalidate();
}

//下落方法
public void downLoad(){
y+=10;
gameView.invalidate();//重新繪制
}

public int getX() {
return x;
}

public void setX(int x) {
this.x = x;
}

public int getY() {
return y;
}

public void setY(int y) {
this.y = y;
}


}
[java]
package www.csdn.net.tetris.domain; 
 
import www.csdn.net.tetris.view.GameView; 
 
public class Block { 
 
    private int x=20,y=20; 
     
     
    public GameView gameView; 
    public Block(GameView gameView){ 
        this.gameView=gameView; 
    } 
     
     
 
    //向左移動  
    public void moveLeft(){ 
        x-=10; 
        gameView.invalidate(); 
    } 
     
    //向右移動  
    public void moveRight(){ 
        x+=10; 
        gameView.invalidate(); 
    } 
     
    //下落方法  
        public void downLoad(){ 
            y+=10; 
            gameView.invalidate();//重新繪制  
        } 
     
    public int getX() { 
        return x; 
    } 
 
    public void setX(int x) { 
        this.x = x; 
    } 
 
    public int getY() { 
        return y; 
    } 
 
    public void setY(int y) { 
        this.y = y; 
    } 
     
     
} 

package www.csdn.net.tetris.domain;

import www.csdn.net.tetris.view.GameView;

public class Block {

 private int x=20,y=20;
 
 
 public GameView gameView;
 public Block(GameView gameView){
  this.gameView=gameView;
 }
 
 

 //向左移動
 public void moveLeft(){
  x-=10;
  gameView.invalidate();
 }
 
 //向右移動
 public void moveRight(){
  x+=10;
  gameView.invalidate();
 }
 
 //下落方法
  public void downLoad(){
   y+=10;
   gameView.invalidate();//重新繪制
  }
 
 public int getX() {
  return x;
 }

 public void setX(int x) {
  this.x = x;
 }

 public int getY() {
  return y;
 }

 public void setY(int y) {
  this.y = y;
 }
 
 
}

3、創建一個畫布和線程的操作

[java]
package www.csdn.net.tetris.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.View;
import www.csdn.net.tetris.domain.Block;

public class GameView extends View {

public static Block block;

public Handler handler;
//定義方向
public static int dir=-1;
//上下左右
public static final int DIRUP=1;
public static final int DIRDOWN=2;
public static final int DIRLEFT=3;
public static final int DIRRIGHT=4;

public GameView(Context context,AttributeSet attrs) {
super(context);
//創建俄羅斯方塊對象
this.block=new Block(this);


handler=new Handler(){
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case DIRLEFT:
GameView.block.moveLeft();
break;
case DIRRIGHT:
GameView.block.moveRight();
break;


default:
GameView.block.downLoad();
break;
}

}
};

 


//創建線程
new Thread (new Runnable(){

@Override
public void run() {
while(true){
try{
System.out.println("子線程名稱：：："+Thread.currentThread().getName());
//block.downLoad();
Thread.sleep(1000);
handler.sendEmptyMessage(dir);
}catch(Exception e){
e.printStackTrace();
}
}

}

}).start();
}

@Override
protected void onDraw(Canvas canvas) {

super.onDraw(canvas);
//設置了畫布的顏色
canvas.drawARGB(255, 0, 0, 255);
//設置一個畫筆
Paint paint=new Paint();
paint.setARGB(255, 255, 0, 0);
canvas.drawCircle(block.getX(), block.getY(), 10, paint);
}

}
[java]
package www.csdn.net.tetris.view; 
 
import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Paint; 
import android.os.Handler; 
import android.os.Message; 
import android.util.AttributeSet; 
import android.view.View; 
import www.csdn.net.tetris.domain.Block; 
 
public class GameView extends View { 
 
    public static Block block; 
     
    public Handler handler; 
    //定義方向  
    public static  int dir=-1; 
    //上下左右  
    public static final int DIRUP=1; 
    public static final int DIRDOWN=2; 
    public static final int DIRLEFT=3; 
    public static final int DIRRIGHT=4; 
     
    public GameView(Context context,AttributeSet attrs) { 
        super(context); 
        //創建俄羅斯方塊對象  
        this.block=new Block(this); 
         
         
        handler=new Handler(){ 
            public void handleMessage(Message msg) { 
                super.handleMessage(msg); 
                switch (msg.what) { 
                case DIRLEFT: 
                    GameView.block.moveLeft(); 
                    break; 
                case DIRRIGHT: 
                    GameView.block.moveRight(); 
                    break; 
                 
                     
                default: 
                    GameView.block.downLoad(); 
                    break; 
                } 
 
            } 
        }; 
         
         
         
         
        //創建線程  
        new Thread (new Runnable(){ 
 
            @Override 
            public void run() { 
                while(true){ 
                    try{ 
                        System.out.println("子線程名稱：：："+Thread.currentThread().getName()); 
                        //block.downLoad();  
                        Thread.sleep(1000); 
                        handler.sendEmptyMessage(dir); 
                    }catch(Exception e){ 
                        e.printStackTrace(); 
                    } 
                } 
                 
            } 
             
        }).start(); 
    } 
 
    @Override 
    protected void onDraw(Canvas canvas) { 
         
        super.onDraw(canvas); 
        //設置了畫布的顏色  
        canvas.drawARGB(255, 0, 0, 255); 
        //設置一個畫筆  
        Paint paint=new Paint(); 
        paint.setARGB(255, 255, 0, 0); 
        canvas.drawCircle(block.getX(), block.getY(), 10, paint); 
    } 
     
} 

package www.csdn.net.tetris.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.View;
import www.csdn.net.tetris.domain.Block;

public class GameView extends View {

 public static Block block;
 
 public Handler handler;
 //定義方向
 public static  int dir=-1;
 //上下左右
 public static final int DIRUP=1;
 public static final int DIRDOWN=2;
 public static final int DIRLEFT=3;
 public static final int DIRRIGHT=4;
 
 public GameView(Context context,AttributeSet attrs) {
  super(context);
  //創建俄羅斯方塊對象
  this.block=new Block(this);
  
  
  handler=new Handler(){
   public void handleMessage(Message msg) {
    super.handleMessage(msg);
    switch (msg.what) {
    case DIRLEFT:
     GameView.block.moveLeft();
     break;
    case DIRRIGHT:
     GameView.block.moveRight();
     break;
    
     
    default:
     GameView.block.downLoad();
     break;
    }

   }
  };
  
  
  
  
  //創建線程
  new Thread (new Runnable(){

   @Override
   public void run() {
    while(true){
     try{
      System.out.println("子線程名稱：：："+Thread.currentThread().getName());
      //block.downLoad();
      Thread.sleep(1000);
      handler.sendEmptyMessage(dir);
     }catch(Exception e){
      e.printStackTrace();
     }
    }
    
   }
   
  }).start();
 }

 @Override
 protected void onDraw(Canvas canvas) {
  
  super.onDraw(canvas);
  //設置了畫布的顏色
  canvas.drawARGB(255, 0, 0, 255);
  //設置一個畫筆
  Paint paint=new Paint();
  paint.setARGB(255, 255, 0, 0);
  canvas.drawCircle(block.getX(), block.getY(), 10, paint);
 }
 
}

4、在MainActivity中的操作

[java]
package com.example.tetris;

 

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import www.csdn.net.tetris.domain.Block;
import www.csdn.net.tetris.view.GameView;


public class GameActivity extends Activity {
//聲明按鈕控件
public Button btn_start;
public Button btn_right;
public Button btn_left;

 

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_game);
//獲取按鈕控件
btn_start=(Button) findViewById(R.id.btn_start);


btn_start.setOnClickListener(new MyOnClickListener());
System.out.println("主線程：：："+Thread.currentThread().getName());


}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

class MyOnClickListener implements View.OnClickListener{

@Override
public void onClick(View v) {
int id=v.getId();
switch (id) {
case R.id.btn_start:
//GameView gameView=new GameView(GameActivity.this,null);
GameActivity.this.setContentView(R.layout.activity_layout);

//獲取控件
btn_right=(Button) findViewById(R.id.btn_right);
btn_left=(Button) findViewById(R.id.btn_left);

btn_left.setOnClickListener(new MyOnClickListener());
btn_right.setOnClickListener(new MyOnClickListener());


break;
case R.id.btn_left:
Toast.makeText(GameActivity.this, "向左移動", Toast.LENGTH_LONG).show();
GameView.block.moveLeft();
//GameView.dir=GameView.DIRLEFT;
break;
case R.id.btn_right:
Toast.makeText(GameActivity.this, "向右移動", Toast.LENGTH_LONG).show();
GameView.block.moveRight();
//GameView.dir=GameView.DIRRIGHT;
break;

default:
break;
}

}

}
}

 

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