Sample_2_12.zip_android

package wyf.ytl; import java.io.IOException;//引入相关类 import android.app.Activity; import android.hardware.Camera; import android.os.Bundle; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.widget.Button; public class Sample_2_12 extends Activity implements SurfaceHolder.Callback{ Camera myCamera;//Camera的引用 SurfaceView mySurfaceView;//SurfaceView的引用 SurfaceHolder mySurfaceHolder;//SurfaceHolder的引用 Button button1;//按钮的引用 Button button2; boolean isPreview = false;//是否在浏览中 public void onCreate(Bundle savedInstanceState) {//重写的onCreate方法 super.onCreate(savedInstanceState); setContentView(R.layout.main); mySurfaceView = (SurfaceView) findViewById(R.id.surfaceView);//得到SurfaceView的引用 button1 = (Button) findViewById(R.id.button1); button2 = (Button) findViewById(R.id.button2);//得到两个按钮的应用 mySurfaceHolder = mySurfaceView.getHolder();//获得SurfaceHolder mySurfaceHolder.addCallback(this); mySurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); button1.setOnClickListener(new Button.OnClickListener(){//打开的按钮监听 public void onClick(View arg0) { initCamera(); } }); button2.setOnClickListener(new Button.OnClickListener(){//关闭的按钮监听 public void onClick(View arg0) { if(myCamera != null && isPreview){//正在显示时 myCamera.stopPreview(); myCamera.release(); myCamera = null; isPreview = false; } } }); } public void initCamera(){//初始化相机资源 if(!isPreview){ myCamera = Camera.open(); } if(myCamera != null && !isPreview){ try { myCamera.setPreviewDisplay(mySurfaceHolder); myCamera.startPreview();//立即运行Preview } catch (IOException e) { e.printStackTrace();//打印错误信息 } isPreview = true; } } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } public void surfaceCreated(SurfaceHolder holder) { } public void surfaceDestroyed(SurfaceHolder holder) { } }