我正在构建一个使用内置摄像头的 android 应用程序。我正在逐步构建，所以我首先检查了相机预览。它在我的果冻豆手机上运行良好但是在姜饼手机上运行相同的应用程序失败并出现无法启动预览错误
这是详细信息
表面视图在 xml 布局中定义，大小任意 果冻豆手机是galaxy s3，屏幕属于普通类别 姜饼设备是galaxy Y，屏幕属于小类别
这是日志输出
04-01 23:54:44.117: I/ApplicationPackageManager(15419): cscCountry is not German : INU
04-01 23:54:44.671: D/AndroidRuntime(15419): Shutting down VM
04-01 23:54:44.671: W/dalvikvm(15419): threadid=1: thread exiting with uncaught exception (group=0x40018578)
04-01 23:54:44.703: E/AndroidRuntime(15419): FATAL EXCEPTION: main
04-01 23:54:44.703: E/AndroidRuntime(15419): java.lang.RuntimeException: startPreview failed
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.hardware.Camera.startPreview(Native Method)
04-01 23:54:44.703: E/AndroidRuntime(15419): at com.example.witalk.CameraHandle.surfaceCreated(CameraHandle.java:98)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.SurfaceView.updateWindow(SurfaceView.java:552)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.SurfaceView.dispatchDraw(SurfaceView.java:350)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.View.draw(View.java:6883)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.widget.FrameLayout.draw(FrameLayout.java:357)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewGroup.drawChild(ViewGroup.java:1646)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.View.draw(View.java:6883)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.widget.FrameLayout.draw(FrameLayout.java:357)
04-01 23:54:44.703: E/AndroidRuntime(15419): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1940)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewRoot.draw(ViewRoot.java:1527)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewRoot.performTraversals(ViewRoot.java:1264)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.view.ViewRoot.handleMessage(ViewRoot.java:1865)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.os.Handler.dispatchMessage(Handler.java:99)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.os.Looper.loop(Looper.java:130)
04-01 23:54:44.703: E/AndroidRuntime(15419): at android.app.ActivityThread.main(ActivityThread.java:3687)
04-01 23:54:44.703: E/AndroidRuntime(15419): at java.lang.reflect.Method.invokeNative(Native Method)
04-01 23:54:44.703: E/AndroidRuntime(15419): at java.lang.reflect.Method.invoke(Method.java:507)
04-01 23:54:44.703: E/AndroidRuntime(15419): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
04-01 23:54:44.703: E/AndroidRuntime(15419): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
04-01 23:54:44.703: E/AndroidRuntime(15419): at dalvik.system.NativeStart.main(Native Method)
这是代码
主要活动.java
package com.example.witalk;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.SurfaceView;
import android.view.WindowManager;
public class MainActivity extends Activity {
private CameraHandle cameraHandle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SurfaceView surface=(SurfaceView)findViewById(R.id.surfaceView1);
cameraHandle=new CameraHandle(0);
cameraHandle.initializeCamera(getWindowManager().getDefaultDisplay().getRotation());
cameraHandle.setDisplaySurface(surface);
cameraHandle.startPreview();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
protected void onDestroy() {
cameraHandle.stop();
super.onDestroy();
}
}
相机句柄.java
package com.example.witalk;
import java.io.IOException;
import android.graphics.ImageFormat;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PreviewCallback;
import android.util.Log;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.WindowManager;
public class CameraHandle implements Callback, PreviewCallback {
private static Camera camera;
private static SurfaceView surface;
private static byte[] imageBuffer;
private static byte[] imageData;
private static int height,width;
private static Parameters cameraSettings;
private static boolean surfaceReady,cameraReady;
long lastTime;
public CameraHandle(int id )
{
camera=Camera.open(id);
}
public void initializeCamera(int rotation){
cameraSettings=camera.getParameters();
height=cameraSettings.getPreviewSize().height;
width=cameraSettings.getPreviewSize().width;
imageBuffer=new byte[(ImageFormat.getBitsPerPixel(cameraSettings.getPreviewFormat())*width*height)/8];
camera.addCallbackBuffer(imageBuffer);
if(rotation==Surface.ROTATION_0)
camera.setDisplayOrientation(90);
if(rotation==Surface.ROTATION_90)
camera.setDisplayOrientation(0);
if(rotation==Surface.ROTATION_270)
camera.setDisplayOrientation(180);
}
public void setDisplaySurface(SurfaceView surface){
this.surface=surface;
surface.getHolder().addCallback(this);
}
public void startPreview(){
if(surfaceReady){
try {
Log.d("CameraHandler", "camera from start Preview");
camera.setPreviewDisplay(surface.getHolder());
camera.setPreviewCallbackWithBuffer(this);
} catch (IOException e) {}
camera.startPreview();
}
else
cameraReady=true;
}
public static byte[] getData(){
return imageData;
}
public void stop(){
if(camera!=null){
camera.stopPreview();
camera.release();}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(holder);
surfaceReady=true;
if(cameraReady){
camera.startPreview();
camera.setPreviewCallbackWithBuffer(this);
Log.d("CameraBuffer", "camera from surface");
}
} catch (IOException e) {
Log.e("CameraHandler","Something went wrong cannot set preview");
e.printStackTrace();}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
@Override
public void onPreviewFrame(byte[] newData, Camera camera) {
imageData=newData;
camera.addCallbackBuffer(imageBuffer);
}
}