我试图实现相机访问，就像它发布在几个页面中一样。
这是代码
package view;
import R;
import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
public class doInspectionImage extends Activity{
private cameraPreview csv;
private Camera cam;
private String rid;
public void onCreate(Bundle is){
super.onCreate(is);
this.rid = getIntent().getStringExtra("reportid");
setContentView(R.layout.spectware_view_takepicture);
csv = new cameraPreview(this);
FrameLayout preview = (FrameLayout)findViewById(R.id.picturepreview);
preview.addView(csv);
Button takeAPicture = (Button)findViewById(R.id.takePicture);
takeAPicture.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
cam = csv.getCamera();
addText();
}
});
}
public void onPause(){
super.onPause();
csv.CameraDisable();
}
public void onResume(){
super.onResume();
csv = new cameraPreview(this);
FrameLayout preview = (FrameLayout)findViewById(R.id.picturepreview);
preview.addView(csv);
Button takeAPicture = (Button)findViewById(R.id.takePicture);
takeAPicture.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
cam = csv.getCamera();
addText();
}
});
}
private void addText(){
setContentView(R.layout.spectware_view_picturetext);
Button storePic = (Button)findViewById(R.id.storepicture);
storePic.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
EditText dt = (EditText)findViewById(R.id.picturetext);
storePicture(dt.getText().toString());
finish();
}
});
}
private void storePicture(String txt){
cam.takePicture(null,null,new model.camera.Camera(rid,txt));
}
}
包视图；
import java.io.IOException;
import android.content.Context;
import android.hardware.Camera;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class cameraPreview extends SurfaceView implements SurfaceHolder.Callback{
private SurfaceHolder holder;
private Camera camera;
public cameraPreview(Context context){
super(context);
this.holder = this.getHolder();
this.holder.addCallback(this);
this.holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
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);
}
}
public void CameraEnable(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);
}
}
public void CameraDisable(){
this.camera.release();
}
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();
}
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 this.camera;
}
public void onPause(){
}
}
一旦我开始这项活动
Intent i = new Intent();
i.setClass(l,doInspectionImage.class);
i.putExtra("reportid",l.inspection_id);
startActivity(i);
我在记录器中收到此消息：
05-26 02:35:12.550: W/dalvikvm(8300): threadid=1: thread exiting with uncaught exception (group=0x4001e578)
05-26 02:35:12.600: E/AndroidRuntime(8300): FATAL EXCEPTION: main
05-26 02:35:12.600: E/AndroidRuntime(8300): java.lang.RuntimeException: Fail to connect to camera service
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.hardware.Camera.native_setup(Native Method)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.hardware.Camera.<init>(Camera.java:300)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.hardware.Camera.open(Camera.java:275)
05-26 02:35:12.600: E/AndroidRuntime(8300): at view.cameraPreview.surfaceCreated(cameraPreview.java:22)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.SurfaceView.updateWindow(SurfaceView.java:569)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.SurfaceView.updateWindow(SurfaceView.java:407)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.SurfaceView.dispatchDraw(SurfaceView.java:352)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.View.draw(View.java:6936)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.widget.FrameLayout.draw(FrameLayout.java:357)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.drawChild(ViewGroup.java:1646)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.View.draw(View.java:6936)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.widget.FrameLayout.draw(FrameLayout.java:357)
05-26 02:35:12.600: E/AndroidRuntime(8300): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1917)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewRoot.draw(ViewRoot.java:1530)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewRoot.performTraversals(ViewRoot.java:1266)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.view.ViewRoot.handleMessage(ViewRoot.java:1868)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.os.Handler.dispatchMessage(Handler.java:99)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.os.Looper.loop(Looper.java:130)
05-26 02:35:12.600: E/AndroidRuntime(8300): at android.app.ActivityThread.main(ActivityThread.java:3691)
05-26 02:35:12.600: E/AndroidRuntime(8300): at java.lang.reflect.Method.invokeNative(Native Method)
05-26 02:35:12.600: E/AndroidRuntime(8300): at java.lang.reflect.Method.invoke(Method.java:507)
05-26 02:35:12.600: E/AndroidRuntime(8300): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
05-26 02:35:12.600: E/AndroidRuntime(8300): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
05-26 02:35:12.600: E/AndroidRuntime(8300): at dalvik.system.NativeStart.main(Native Method)
我尽可能靠近样品。我不知道我做了什么不同，除了我必须做出改变来实现它的目的。我很感谢任何帮助。
克里斯
PS：如果我点击后退按钮，我会得到预览。但在那之后一秒钟，应用程序崩溃了。