我有一个应用程序，目前使用相机拍摄图像，此时一旦拍摄图像，它保存到SD卡上的文件夹，然后同一屏幕保持打开，以便可以拍摄另一张照片。 / p>
我想要它，所以当图像拍摄并保存后，新屏幕会在新屏幕上打开。
我创建了一个新的xml文件punch.xml和java Punch.java并在清单中注册了它们我只是想弄清楚如何将应用程序设置为打开一个刚刚显示的图片的新屏幕了。
我猜这是在保存图像后打开新的Intent时要做的事情。
更新
好的，所以现在所有工作人员都会在下一个屏幕上显示图像吗？
Punch.java
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.punch);
String myRef = this.getIntent().getStringExtra("filepath");
}
AndroidCamera.java 更新以反映代码更改
public class AndroidCamera extends Activity implements SurfaceHolder.Callback{
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
boolean previewing = false;
LayoutInflater controlInflater = null;
final int RESULT_SAVEIMAGE = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView)findViewById(R.id.camerapreview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
controlInflater = LayoutInflater.from(getBaseContext());
View viewControl = controlInflater.inflate(R.layout.control, null);
LayoutParams layoutParamsControl
= new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT);
this.addContentView(viewControl, layoutParamsControl);
Button buttonTakePicture = (Button)findViewById(R.id.takepicture);
buttonTakePicture.setOnClickListener(new Button.OnClickListener(){
public void onClick(View arg0) {
// TODO Auto-generated method stub
camera.takePicture(myShutterCallback,
myPictureCallback_RAW, myPictureCallback_JPG);
}});
}
ShutterCallback myShutterCallback = new ShutterCallback(){
public void onShutter() {
// TODO Auto-generated method stub
}};
PictureCallback myPictureCallback_RAW = new PictureCallback(){
public void onPictureTaken(byte[] arg0, Camera arg1) {
// TODO Auto-generated method stub
}};
PictureCallback myPictureCallback_JPG = new PictureCallback(){
public void onPictureTaken(byte[] arg0, Camera arg1) {
// TODO Auto-generated method stub
/*Bitmap bitmapPicture
= BitmapFactory.decodeByteArray(arg0, 0, arg0.length); */
int imageNum = 0;
Intent imageIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
File imagesFolder = new File(Environment.getExternalStorageDirectory(), "Punch");
imagesFolder.mkdirs(); // <----
String fileName = "image_" + String.valueOf(imageNum) + ".jpg";
File output = new File(imagesFolder, fileName);
while (output.exists()){
imageNum++;
fileName = "image_" + String.valueOf(imageNum) + ".jpg";
output = new File(imagesFolder, fileName);
}
Uri uriSavedImage = Uri.fromFile(output);
imageIntent.putExtra(MediaStore.EXTRA_OUTPUT, uriSavedImage);
OutputStream imageFileOS;
try {
imageFileOS = getContentResolver().openOutputStream(uriSavedImage);
imageFileOS.write(arg0);
imageFileOS.flush();
imageFileOS.close();
Toast.makeText(AndroidCamera.this,
"Image saved",
Toast.LENGTH_LONG).show();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Intent intent = new Intent(getBaseContext(), Punch.class);
intent.putExtra("filepath",uriSavedImage);
//just using a request code of zero
int request=0;
startActivityForResult(intent,request);
}};
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
if(previewing){
camera.stopPreview();
previewing = false;
}
if (camera != null){
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
previewing = true;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera = Camera.open();
try {
Camera.Parameters parameters = camera.getParameters();
if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
// This is an undocumented although widely known feature
parameters.set("orientation", "portrait");
// For Android 2.2 and above
camera.setDisplayOrientation(90);
// Uncomment for Android 2.0 and above
parameters.setRotation(90);
} else {
// This is an undocumented although widely known feature
parameters.set("orientation", "landscape");
// For Android 2.2 and above
camera.setDisplayOrientation(0);
// Uncomment for Android 2.0 and above
parameters.setRotation(0);
}
camera.setParameters(parameters);
camera.setPreviewDisplay(holder);
} catch (IOException exception) {
camera.release();
}
camera.startPreview();
}
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera.stopPreview();
camera.release();
camera = null;
previewing = false;
}
}
更新
查看使用putExtra（）的建议如何设置和检索此值？
答案 0 :(得分：1)
您可以保存对图像保存位置的引用，将其置于意图中以打开新活动。启动新活动并显示图像，允许用户删除等。
Intent intent = new Intent(getBaseContext(), target.class);
intent.putExtra("ImageReference", reference);
startActivity(intent);
而target.class是您的活动类的名称。
答案 1 :(得分：1)
因此，在上面的代码中，您似乎正在设置意图。这将在拍照后立即运行。
显然，您需要参考保存文件的位置。然后在新的活动类中调用Punch.class，您需要执行以下操作： -
String myRef = this.getIntent().getStringExtra("ImageReference");
这意味着您将String文件路径从主活动传递到您创建的新Punch.class。在这里，您可以使用文件路径打开图像。
答案 2 :(得分：1)
这里的问题是你正在打电话
camera.startPreview();
在你的图片中回调。
您将其替换为onClick中的代码并将其更改为startActivityForResult（）：
Intent intent = new Intent(getBaseContext(), Punch.class);
intent.putExtra("filepath",uriSavedImage);
//just using a request code of zero
int request=0;
startActivityForResult(intent,request);
然后你可以实现onActivityResult并从那里调用camera.StartPreview()。
不要忘记在拳击活动中使用setResult