最近在学android的camera，在拍照按钮的点击事件中做了如下参数设置：
public void capture(View view){
if(mCamera!=null){
WindowManager manager= (WindowManager) getSystemService(Context.WINDOW_SERVICE);
Display display=manager.getDefaultDisplay();
Log.i("capture",display.getWidth()+" "+display.getHeight());
Camera.Parameters parameters=mCamera.getParameters();
//设置拍照格式
parameters.setPictureFormat(PixelFormat.YCbCr_422_SP);
//设置拍照大小
parameters.setPictureSize(213,350);
//设置自动对焦
parameters.setFlashMode(Camera.Parameters.FOCUS_MODE_AUTO);
mCamera.setParameters(parameters);
mCamera.autoFocus(new Camera.AutoFocusCallback() {
@Override
public void onAutoFocus(boolean success, Camera camera) {
mCamera.takePicture(null,null,mPictureCallback);
}
});
}
}
点击拍照按钮的时候程序崩溃了，出现如下的日志信息：
Process: com.example.vampire.facelearning, PID: 14489
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.view.View$DeclaredOnClickListener.onClick(View.java:4461)
at android.view.View.performClick(View.java:5207)
at android.view.View$PerformClick.run(View.java:21177)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5432)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:735)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4456)
at android.view.View.performClick(View.java:5207)
at android.view.View$PerformClick.run(View.java:21177)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5432)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:735)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
Caused by: java.lang.RuntimeException: setParameters failed
at android.hardware.Camera.native_setParameters(Native Method)
at android.hardware.Camera.setParameters(Camera.java:2003)
at com.example.vampire.facelearning.CustomCamera.capture(CustomCamera.java:85)
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4456)
at android.view.View.performClick(View.java:5207)
at android.view.View$PerformClick.run(View.java:21177)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5432)
at java.lang.reflect.Method.invoke(Native Method)
我把mCamera.setParameters(parameters);注析掉后程序就可以进行拍照了，但遇到了另一个问题。拍照获取的图片尺寸非常小：
这是onPictureToken方法的实现方法：
private Camera.PictureCallback mPictureCallback=new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
//将数据写入SD卡的temp.png文件当中
File tempFile=new File("/sdcard/temp.png");
try {
FileOutputStream fileOutputStream=new FileOutputStream(tempFile);
fileOutputStream.write(data);
fileOutputStream.close();
Intent intent=new Intent(CustomCamera.this,ResultAty.class);
intent.putExtra("picPath",tempFile.getAbsolutePath());
startActivity(intent);
CustomCamera.this.finish();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
};
跳转到另一个activity来进行显示图片：
String path=getIntent().getStringExtra("picPath");
ImageView imageView= (ImageView) findViewById(R.id.pic);
//对图像的显示角度进行调整
try {
FileInputStream fis=new FileInputStream(path);
//把图像转换成字节流
Bitmap bitmap=BitmapFactory.decodeStream(fis);
Matrix matrix=new Matrix();
matrix.setRotate(90);
//调整角度
bitmap=Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix,true);
imageView.setImageBitmap(bitmap);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
麻烦各位大神给个提示，我自己debug了很久都没有找出问题所在，谢谢！
