我見過類似的問題,我有,但我仍然無法找到解決方案。我對Android開發非常陌生,所以我無法跟蹤我的問題。無論如何,我正嘗試使用我創建的CameraSurfaceView類創建相機預覽,該類可以擴展SurfaceView並實現SurfaceHolder.Callback。無論我在StartCamera類中嘗試什麼,都不會調用surfaceCreated()方法,因此我的相機永遠不會啓動。任何幫助將是偉大的,謝謝!surfaceCreated()從來沒有叫
StartCamera.java
import net.peterd.zombierun.R;
import android.hardware.Camera;
import android.os.Bundle;
import android.widget.FrameLayout;
public class StartCamera extends BaseActivity {
private Camera mCamera;
private CameraSurfaceView mView;
public void onCreate(Bundle state) {
// TODO Auto-generated constructor stub
super.onCreate(state);
setContentView(R.layout.start_camera);
}
public void onResume() {
super.onResume();
mView = new CameraSurfaceView(this);
FrameLayout preview = (FrameLayout) findViewById(R.id.cPreview);
preview.addView(mView);
}
public void onPause() {
mCamera.stopPreview();
mCamera.release();
}
}
CameraSurfaceView.java
import java.io.IOException;
import android.content.Context;
import android.hardware.Camera;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback
{
private SurfaceHolder holder;
private Camera camera;
public CameraSurfaceView(Context context)
{
super(context);
//Initiate the Surface Holder properly
this.holder = this.getHolder();
this.holder.addCallback(this);
this.holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceCreated(SurfaceHolder holder)
{
try
{
//Open the Camera in preview mode
this.camera = Camera.open();
this.camera.setPreviewDisplay(this.holder);
}
catch(IOException ioe)
{
ioe.printStackTrace(System.out);
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
// Now that the size is known, set up the camera parameters and begin
// the preview.
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewSize(width, height);
camera.setParameters(parameters);
camera.startPreview();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder)
{
// Surface will be destroyed when replaced with a new screen
//Always make sure to release the Camera instance
camera.stopPreview();
camera.release();
camera = null;
}
public Camera getCamera() {
return camera;
}
}
start_camera.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<FrameLayout android:id="@+id/cPreview"
android:layout_weight="1" android:layout_width="fill_parent"
android:layout_height="fill_parent">
</FrameLayout>
</LinearLayout>
我遇到同樣的問題。有誰能解決這個問題嗎 –