我正在构建一个相机应用程序。它在我的Sony Experia手机上正常运行。但是当我要拍照时，它会在KitKat上崩溃。请给我一些帮助。
这是我的相机预览类............
package com.hnjcreations.cameratest;
import java.io.IOException;
import android.annotation.SuppressLint;
import android.content.Context;
import android.hardware.Camera;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
@SuppressLint("ViewConstructor") public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private Camera mCamera;
@SuppressWarnings("deprecation")
public CameraPreview(Context context,Camera camera) {
super(context);
mCamera = camera;
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
LeafReader.safeToTakePicture=true;
ColorBarReader.safeToTakePic=true;
}catch (IOException e) {
Log.d(" ", "Error setting camera preview: " + e.getMessage());
}
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
if (mHolder.getSurface() == null){
return;
}
try {
mCamera.stopPreview();
} catch (Exception e){
}
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e){
}
}
}
这是我的照片上课.........
package com.hnjcreations.cameratest;
import android.os.Build;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.Typeface;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class LeafReader extends Activity implements OnClickListener {
private static Camera mCamera;
private CameraPreview mPreview;
ImageView square;
Button menuButton;
TextView tv;
static final int REQUEST_IMAGE_CAPTURE = 1;
public static final int MEDIA_TYPE_IMAGE = 1;
int x = 0, y = 0;
public int reqcolor = 0;
public static boolean safeToTakePicture = false;
public static Activity lRead=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.leaf_reader);
lRead=this;
startCamera();
setViews();
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}
@Override
protected void onPause()
{
super.onPause();
try
{
mCamera.stopPreview();
mPreview.getHolder().removeCallback(mPreview);
mCamera.release();
mCamera = null;
}
catch(Exception e)
{
}
}
@Override
protected void onResume() {
super.onResume();
if(mCamera==null)
{
mPreview.getHolder().removeCallback(mPreview);
mCamera = getCameraInstance();
startPreview();
Toast.makeText(LeafReader.this,"startPreview",Toast.LENGTH_SHORT).show();
}
}
// set views
void setViews() {
menuButton = (Button) findViewById(R.id.menubutton);
menuButton.setOnClickListener(this);
tv=(TextView)findViewById(R.id.sinLeafCap);
Typeface tf=Typeface.createFromAsset(getAssets(), "KANDYN~1.TTF");
tv.setTextColor(Color.BLACK);
tv.setTypeface(tf);
}
//
private static Camera getCameraInstance(){
Camera c = null;
try {
c = Camera.open();
c.setDisplayOrientation(90);
} catch (RuntimeException e) {
}
return c;
}
// start camera
public void startCamera() {
mCamera=getCameraInstance();
startPreview();
}
// start preview
public void startPreview()
{
mPreview = new CameraPreview(this, mCamera);
FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(mPreview);
}
// menu
@SuppressLint("NewApi")
@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.menubutton:
if(Mainmenudisp.mainMenu!=null)
{
Mainmenudisp.mainMenu.finish();
}
startActivity(new Intent("com.hnjcreations.cameratest.MAINMENU"));
}
}
// take picture
private PictureCallback mpicture = new PictureCallback() {
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
public void onPictureTaken(byte[] data, Camera camera) {
try {
Bitmap mybitmap = getBitmap(data);
int width = mybitmap.getWidth(), height = mybitmap.getHeight();
String hexColStr=Integer.toHexString(mybitmap.getPixel(width / 2, height / 2));
String reqFeriAmount=getFerAmou(hexColStr);
Intent colorint = new Intent(getBaseContext(), LeafData.class);
colorint.putExtra("enter code",mybitmap.getPixel(width / 2, height / 2));
colorint.putExtra("receive code",reqFeriAmount);
finish();
startActivity(colorint);
} catch (Exception e) {
Toast.makeText(LeafReader.this,"Error",Toast.LENGTH_LONG).show();
}
}};
@Override
public boolean onTouchEvent(MotionEvent event) {
if (safeToTakePicture) {
mCamera.takePicture(null, null, mpicture);
}
return true;
}
// converting byte to bitmap
public Bitmap getBitmap(byte[] bitmap) {
return BitmapFactory.decodeByteArray(bitmap, 0, bitmap.length);
}
}
logcat的：
02-17 07:44:53.781: E/AndroidRuntime(10272): FATAL EXCEPTION: main
02-17 07:44:53.781: E/AndroidRuntime(10272): Process: com.hnjcreations.cameratest, PID: 10272
02-17 07:44:53.781: E/AndroidRuntime(10272): java.lang.RuntimeException: takePicture failed
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.hardware.Camera.native_takePicture(Native Method)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.hardware.Camera.takePicture(Camera.java:1597)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.hardware.Camera.takePicture(Camera.java:1542)
02-17 07:44:53.781: E/AndroidRuntime(10272): at com.hnjcreations.cameratest.ColorBarReader.onTouchEvent(ColorBarReader.java:153)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.app.Activity.dispatchTouchEvent(Activity.java:2508)
02-17 07:44:53.781: E/AndroidRuntime(10272): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2093)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.View.dispatchPointerEvent(View.java:7973)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4384)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4255)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3801)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3851)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3820)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3927)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3828)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3984)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3801)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3851)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3820)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3828)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3801)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6116)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6096)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6050)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6246)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.os.MessageQueue.nativePollOnce(Native Method)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.os.MessageQueue.next(MessageQueue.java:138)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.os.Looper.loop(Looper.java:150)
02-17 07:44:53.781: E/AndroidRuntime(10272): at android.app.ActivityThread.main(ActivityThread.java:5333)
02-17 07:44:53.781: E/AndroidRuntime(10272): at java.lang.reflect.Method.invokeNative(Native Method)
02-17 07:44:53.781: E/AndroidRuntime(10272): at java.lang.reflect.Method.invoke(Method.java:515)
02-17 07:44:53.781: E/AndroidRuntime(10272): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:829)
02-17 07:44:53.781: E/AndroidRuntime(10272): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:645)
02-17 07:44:53.781: E/AndroidRuntime(10272): at dalvik.system.NativeStart.main(Native Method)