如何在Android中运行示例相机程序,以便拍照
我想为相机编写一个Android程序来捕捉图片。我是这样写代码的,当我点击一个按钮时,它应该被捕获,但什么都没有发生。按钮点击发生,但控件未到达“onPictureTaken”。我正在此处粘贴代码: 活动 camera_surface.xml 你能帮助我如何在Android中运行示例相机程序来拍照吗如何在Android中运行示例相机程序,以便拍照,android,android-widget,Android,Android Widget,我想为相机编写一个Android程序来捕捉图片。我是这样写代码的,当我点击一个按钮时,它应该被捕获,但什么都没有发生。按钮点击发生,但控件未到达“onPictureTaken”。我正在此处粘贴代码: 活动 camera_surface.xml 你能帮助我如何在Android中运行示例相机程序来拍照吗 package makemachine.android.examples; import java.io.File; import android.app.Activity; import andr
package makemachine.android.examples;
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class PhotoCaptureExample extends Activity
{
protected Button _button;
protected ImageView _image;
protected TextView _field;
protected String _path;
protected boolean _taken;
protected static final String PHOTO_TAKEN = "photo_taken";
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
_image = ( ImageView ) findViewById( R.id.image );
_field = ( TextView ) findViewById( R.id.field );
_button = ( Button ) findViewById( R.id.button );
_button.setOnClickListener( new ButtonClickHandler() );
_path = Environment.getExternalStorageDirectory() + "/images /make_machine_example.jpg";
}
public class ButtonClickHandler implements View.OnClickListener
{
public void onClick( View view ){
Log.i("MakeMachine", "ButtonClickHandler.onClick()" );
startCameraActivity();
}
}
protected void startCameraActivity()
{
Log.i("MakeMachine", "startCameraActivity()" );
File file = new File( _path );
Uri outputFileUri = Uri.fromFile( file );
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );
intent.putExtra( MediaStore.EXTRA_OUTPUT, outputFileUri );
startActivityForResult( intent, 0 );
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
Log.i( "MakeMachine", "resultCode: " + resultCode );
switch( resultCode )
{
case 0:
Log.i( "MakeMachine", "User cancelled" );
break;
case -1:
onPhotoTaken();
break;
}
}
protected void onPhotoTaken()
{
Log.i( "MakeMachine", "onPhotoTaken" );
_taken = true;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 4;
Bitmap bitmap = BitmapFactory.decodeFile( _path, options );
_image.setImageBitmap(bitmap);
_field.setVisibility( View.GONE );
}
@Override
protected void onRestoreInstanceState( Bundle savedInstanceState){
Log.i( "MakeMachine", "onRestoreInstanceState()");
if( savedInstanceState.getBoolean( PhotoCaptureExample.PHOTO_TAKEN ) ) {
onPhotoTaken();
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
super.onKeyDown(keyCode, event);
switch(keyCode)
{
case KeyEvent.KEYCODE_CAMERA:
Toast.makeText(PhotoCaptureExample.this, "Pressed Camera Button", Toast.LENGTH_SHORT).show();
return true;
case KeyEvent.KEYCODE_1:
Toast.makeText(PhotoCaptureExample.this, "Pressed 1", Toast.LENGTH_SHORT).show();
return true;
case KeyEvent.KEYCODE_HOME:
Toast.makeText(PhotoCaptureExample.this, "Pressed Home Button", Toast.LENGTH_SHORT).show();
return true;
case KeyEvent.KEYCODE_BACK:
Toast.makeText(PhotoCaptureExample.this, "Pressed Back Button", Toast.LENGTH_SHORT).show();
Intent result = new Intent("Complete");
setResult(Activity.RESULT_OK, result);
finish();
return true;
}
return false;
}
@Override
protected void onSaveInstanceState( Bundle outState ) {
outState.putBoolean( PhotoCaptureExample.PHOTO_TAKEN, _taken );
}
}我没有看到呼叫拍摄照片(Camera.ShutterCallback、Camera.PictureCallback、Camera.PictureCallback、Camera.PictureCallback)
在onclick中,单击add Camera.takepicture@Android\u pro。。。如果答案对你有用,你应该投票表决,或者你可以评论它是否有效,这样其他人就可以从中受益。如果你已经得到了答案,你可以把它加在这里。
<?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"
>
<SurfaceView
android:id="@+id/surface_camera"
android:layout_width="fill_parent"
android:layout_height="10dip"
android:layout_weight="1"
>
</SurfaceView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Gettt"
android:id="@+id/b1"
></Button>
</LinearLayout>
08-24 17:43:41.293: ERROR/MediaPlayerService(30): error: -2
08-24 17:43:41.303: ERROR/MediaPlayer(30): Unable to to create media player
08-24 17:43:41.303: ERROR/CameraService(30): Failed to load CameraService sounds.
08-24 17:43:41.334: ERROR/MediaPlayerService(30): error: -2
08-24 17:43:41.344: ERROR/MediaPlayer(30): Unable to to create media player
08-24 17:43:41.344: ERROR/CameraService(30): Failed to load CameraService sounds.
08-24 17:43:41.354: DEBUG/CameraService(30): Client::Client X (pid 421)
08-24 17:43:41.364: DEBUG/CameraService(30): CameraService::connect X
08-24 17:43:41.364: DEBUG/CameraService(30): getParameters(picture-format=jpeg;picture-size=213x350;preview-format=yuv422sp;preview-frame-rate=15;preview-size=176x144)
08-24 17:43:41.445: DEBUG/CameraService(30): setParameters(preview-size=320x432;preview-format=yuv422sp;picture-size=213x350;picture-format=jpeg;preview-frame-rate=15)
08-24 17:43:41.445: DEBUG/CameraHardwareStub(30): initHeapLocked: preview size=320x432
08-24 17:43:41.455: DEBUG/CameraService(30): setPreviewDisplay(0xe1f0) (pid 421)
08-24 17:43:41.464: DEBUG/CameraService(30): startPreview (pid 421)
08-24 17:43:41.464: DEBUG/CameraService(30): startCameraMode(0) (pid 421)
08-24 17:43:41.464: DEBUG/CameraService(30): startPreviewMode (pid 421)
package makemachine.android.examples;
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class PhotoCaptureExample extends Activity
{
protected Button _button;
protected ImageView _image;
protected TextView _field;
protected String _path;
protected boolean _taken;
protected static final String PHOTO_TAKEN = "photo_taken";
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
_image = ( ImageView ) findViewById( R.id.image );
_field = ( TextView ) findViewById( R.id.field );
_button = ( Button ) findViewById( R.id.button );
_button.setOnClickListener( new ButtonClickHandler() );
_path = Environment.getExternalStorageDirectory() + "/images /make_machine_example.jpg";
}
public class ButtonClickHandler implements View.OnClickListener
{
public void onClick( View view ){
Log.i("MakeMachine", "ButtonClickHandler.onClick()" );
startCameraActivity();
}
}
protected void startCameraActivity()
{
Log.i("MakeMachine", "startCameraActivity()" );
File file = new File( _path );
Uri outputFileUri = Uri.fromFile( file );
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );
intent.putExtra( MediaStore.EXTRA_OUTPUT, outputFileUri );
startActivityForResult( intent, 0 );
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
Log.i( "MakeMachine", "resultCode: " + resultCode );
switch( resultCode )
{
case 0:
Log.i( "MakeMachine", "User cancelled" );
break;
case -1:
onPhotoTaken();
break;
}
}
protected void onPhotoTaken()
{
Log.i( "MakeMachine", "onPhotoTaken" );
_taken = true;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 4;
Bitmap bitmap = BitmapFactory.decodeFile( _path, options );
_image.setImageBitmap(bitmap);
_field.setVisibility( View.GONE );
}
@Override
protected void onRestoreInstanceState( Bundle savedInstanceState){
Log.i( "MakeMachine", "onRestoreInstanceState()");
if( savedInstanceState.getBoolean( PhotoCaptureExample.PHOTO_TAKEN ) ) {
onPhotoTaken();
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
super.onKeyDown(keyCode, event);
switch(keyCode)
{
case KeyEvent.KEYCODE_CAMERA:
Toast.makeText(PhotoCaptureExample.this, "Pressed Camera Button", Toast.LENGTH_SHORT).show();
return true;
case KeyEvent.KEYCODE_1:
Toast.makeText(PhotoCaptureExample.this, "Pressed 1", Toast.LENGTH_SHORT).show();
return true;
case KeyEvent.KEYCODE_HOME:
Toast.makeText(PhotoCaptureExample.this, "Pressed Home Button", Toast.LENGTH_SHORT).show();
return true;
case KeyEvent.KEYCODE_BACK:
Toast.makeText(PhotoCaptureExample.this, "Pressed Back Button", Toast.LENGTH_SHORT).show();
Intent result = new Intent("Complete");
setResult(Activity.RESULT_OK, result);
finish();
return true;
}
return false;
}
@Override
protected void onSaveInstanceState( Bundle outState ) {
outState.putBoolean( PhotoCaptureExample.PHOTO_TAKEN, _taken );
}