我想使用此代码实现触摸焦点
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
@Override
public void touchFocus(Rect tfocusRect) {
if (_.mCamera == null) return;
// camera.stopFaceDetection();
//Convert from View's width and height to +/- 1000
final Rect targetFocusRect = new Rect(
tfocusRect.left * 2000/sfv.getWidth() - 1000,
tfocusRect.top * 2000/sfv.getHeight() - 1000,
tfocusRect.right * 2000/sfv.getWidth() - 1000,
tfocusRect.bottom * 2000/sfv.getHeight() - 1000);
final List<Camera.Area> focusList = new ArrayList<Camera.Area>();
Camera.Area focusArea = new Camera.Area(targetFocusRect, 1000);
focusList.add(focusArea);
Parameters para = _.mCamera.getParameters();
Log.d(TAG,para.getMaxNumFocusAreas() + " >> " + tfocusRect.toString());
para.setFocusAreas(focusList);
para.setMeteringAreas(focusList);
_.mCamera.setParameters(para);//HERE THE ERROR
_.mCamera.autoFocus(myAutoFocusCallback);
}
在第_.mCamera.setParameters(para);//HERE THE ERROR行，有一个调用堆栈：
12-30 14:27:31.295: D/AndroidRuntime(853): Shutting down VM
12-30 14:27:31.295: W/dalvikvm(853): threadid=1: thread exiting with uncaught exception (group=0x4164ad58)
12-30 14:27:31.345: E/AndroidRuntime(853): FATAL EXCEPTION: main
12-30 14:27:31.345: E/AndroidRuntime(853): Process: my.app.camera, PID: 853
12-30 14:27:31.345: E/AndroidRuntime(853): java.lang.RuntimeException: setParameters failed
12-30 14:27:31.345: E/AndroidRuntime(853): at android.hardware.Camera.native_setParameters(Native Method)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.hardware.Camera.setParameters(Camera.java:1775)
12-30 14:27:31.345: E/AndroidRuntime(853): at my.app.camera.AAP$1.touchFocus(AAP.java:128)
12-30 14:27:31.345: E/AndroidRuntime(853): at my.app.camera.CameraSurfaceView.onTouchEvent(CameraSurfaceView.java:50)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.View.dispatchTouchEvent(View.java:7764)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2245)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1946)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2245)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1946)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2245)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1946)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2245)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1946)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2245)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1946)
12-30 14:27:31.345: E/AndroidRuntime(853): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2151)
12-30 14:27:31.345: E/AndroidRuntime(853): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1532)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.app.Activity.dispatchTouchEvent(Activity.java:2458)
12-30 14:27:31.345: E/AndroidRuntime(853): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2099)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.View.dispatchPointerEvent(View.java:7944)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3953)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3832)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3392)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3442)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3411)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3518)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3419)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3575)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3392)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3442)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3411)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3419)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3392)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5538)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5518)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5489)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5618)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.os.MessageQueue.nativePollOnce(Native Method)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.os.MessageQueue.next(MessageQueue.java:138)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.os.Looper.loop(Looper.java:123)
12-30 14:27:31.345: E/AndroidRuntime(853): at android.app.ActivityThread.main(ActivityThread.java:5095)
12-30 14:27:31.345: E/AndroidRuntime(853): at java.lang.reflect.Method.invokeNative(Native Method)
12-30 14:27:31.345: E/AndroidRuntime(853): at java.lang.reflect.Method.invoke(Method.java:515)
12-30 14:27:31.345: E/AndroidRuntime(853): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-30 14:27:31.345: E/AndroidRuntime(853): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
12-30 14:27:31.345: E/AndroidRuntime(853): at dalvik.system.NativeStart.main(Native Method)
为什么呢？坐标是正确的。结果rect的值介于[-1000,1000]之间。
Android 4.4.4
没有
para.setFocusAreas(focusList);
para.setMeteringAreas(focusList);
一切正常。 _.mCamera的另一个设置也可以。