//显示图片 eclips软件突然死机,用备份eclips和android-sdk恢复,重启也不行,断网线不连接android中心成功恢复。
//显示图片小.放错目录drawable-hdpi 应该放到目录drawable
//显示图片函数 canvas.drawBitmap(blt, src, dst, null); canvas.drawBitmap(bitmap, x, y, null);
Activity01.java
package com.drawImage;
import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.KeyEvent;
public class Activity01 extends Activity
{
private GameView mGameView = null;
public static int screenWidth = 0;
public static int screenHeight = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
mGameView = new GameView(this);
setContentView(mGameView);
/* 定义DisplayMetrics对象 */
DisplayMetrics dm = new DisplayMetrics();
/* 取得窗口属性 */
getWindowManager().getDefaultDisplay().getMetrics(dm);
/* 窗口的宽度 */
screenWidth = dm.widthPixels;
/* 窗口的高度 */
screenHeight = dm.heightPixels;
}
public boolean onKeyUp(int keyCode, KeyEvent event)
{
super.onKeyUp(keyCode, event);
return true;
}
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ( mGameView == null )
{
return false;
}
//return
mGameView.onKeyDown(keyCode,event);
super.onKeyDown(keyCode, event);
return true;
}
}
GameView.java
package com.drawImage;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
public class GameView extends View implements Runnable
{
/* 声明Paint对象 */
private Paint mPaint = null;
/* 创建两个图片对象 */
Bitmap mBitQQ = null;
Bitmap mBitDestTop = null;
int miDTX = 0;
int miDTY = 0;
public GameView(Context context)
{
super(context);
mPaint = new Paint();
miDTX = 0;
/* 从资源文件中装载图片 */
//getResources()->得到Resources
//getDrawable()->得到资源中的Drawable对象,参数为资源索引ID
//getBitmap()->得到Bitmap
mBitQQ = ((BitmapDrawable) getResources().getDrawable(R.drawable.qq)).getBitmap();
mBitDestTop = ((BitmapDrawable) getResources().getDrawable(R.drawable.desktop)).getBitmap();
miDTY = mBitQQ.getHeight();
new Thread(this).start();
}
public void onDraw(Canvas canvas)
{
super.onDraw(canvas);
mPaint = new Paint();
/* 清屏效果 */
canvas.drawColor(Color.GRAY);
/* 在屏幕(0,0)处绘制图片mBitQQ */
GameView.drawImage(canvas, mBitQQ, 0, 0);
/* 在制定位置按指定裁剪的渔区进行绘制 */
//getWidth()->得到图片的宽度
//getHeight()->得到图片的高度 mBitDestTop.getHeight()/2 mBitQQ.getHeight()
GameView.drawImage(canvas, mBitDestTop, miDTX, miDTY, mBitDestTop.getWidth(), mBitDestTop.getHeight(), 0, 0);
canvas.drawText(Activity01.screenWidth+":"+Activity01.screenHeight, 0, Activity01.screenWidth, mPaint);
canvas.drawText(miDTY+"=miDTY",0, Activity01.screenHeight-130, mPaint);
canvas.drawText(mBitDestTop.getHeight()+"=mBitDestTop.getHeight()",Activity01.screenWidth/2-50, Activity01.screenHeight-130, mPaint);
}
// 触笔事件
public boolean onTouchEvent(MotionEvent event)
{
return true;
}
// 按键按下事件
public boolean onKeyDown(int keyCode, KeyEvent event)
{
//左方向键
if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT)
{
if (miDTX > 0)
{
miDTX--;
}
}
//右方向键
else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT)
{
if (miDTX+mBitDestTop.getWidth() < Activity01.screenWidth)
{
miDTX++;
}
}
//上方向键
if (keyCode == KeyEvent.KEYCODE_DPAD_UP)
{
if (miDTY > 0)
{
miDTY--;
}
}
//下方向键
else if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN)
{
if (miDTY+mBitDestTop.getHeight() < Activity01.screenHeight)
{
miDTY++;
}
}
return true;
}
// 按键弹起事件
public boolean onKeyUp(int keyCode, KeyEvent event)
{
return false;
}
public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event)
{
return true;
}
/**
* 线程处理
*/
public void run()
{
while (!Thread.currentThread().isInterrupted())
{
try
{
Thread.sleep(100);
}
catch (InterruptedException e)
{
Thread.currentThread().interrupt();
}
//使用postInvalidate可以直接在线程中更新界面
postInvalidate();
}
}
/*------------------------------------
* 绘制图片
*
* @param x 屏幕上的x坐标
* @param y 屏幕上的y坐标
* @param w 要绘制的图片的宽度
* @param h 要绘制的图片的高度
* @param bx图片上的x坐标
* @param by图片上的y坐标
*
* @return null
------------------------------------*/
public static void drawImage(Canvas canvas, Bitmap blt, int x, int y, int w, int h, int bx, int by)
{
Rect src = new Rect();// 图片
Rect dst = new Rect();// 屏幕
src.left = bx;
src.top = by;
src.right = bx + w;
src.bottom = by + h;
dst.left = x;
dst.top = y;
dst.right = x + w;
dst.bottom = y + h;
canvas.drawBitmap(blt, src, dst, null);
src = null;
dst = null;
}
/**
* 绘制一个Bitmap
* @param canvas 画布
* @param bitmap 图片
* @param x 屏幕上的x坐标
* @param y 屏幕上的y坐标
*/
public static void drawImage(Canvas canvas, Bitmap bitmap, int x, int y)
{
/* 绘制图像 */
canvas.drawBitmap(bitmap, x, y, null);
}
}
Gf_drawImageActivity.java
package pak.drawImage;
import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.KeyEvent;
public class Gf_drawImageActivity extends Activity {
private GameView mGameView = null;
public static int screenWidth = 0;
public static int screenHeight = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
mGameView = new GameView(this);
setContentView(mGameView);
/* 定义DisplayMetrics对象 */
DisplayMetrics dm = new DisplayMetrics();
/* 取得窗口属性 */
getWindowManager().getDefaultDisplay().getMetrics(dm);
/* 窗口的宽度 */
screenWidth = dm.widthPixels;
/* 窗口的高度 */
screenHeight = dm.heightPixels;
}
public boolean onKeyUp(int keyCode, KeyEvent event)
{
super.onKeyUp(keyCode, event);
return true;
}
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ( mGameView == null )
{
return false;
}
//return
mGameView.onKeyDown(keyCode,event);
super.onKeyDown(keyCode, event);
return true;
}
}