我在将从相机中裁剪的图像保存到指定路径的SD卡时遇到了问题。
代码-->
代码-->
public class PhotocropActivity extends Activity
{
/** Called when the activity is first created. */
private static final int SELECT_PICTURE = 1;
private static final int PICK_FROM_CAMERA = 2;
private Uri muri;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final CharSequence[] items = {"Capture New Image", "Upload from gallery"};
AlertDialog.Builder builder = new AlertDialog.Builder(PhotocropActivity.this);
builder.setTitle("Select Image");
builder.setItems(items, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int item)
{
Intent intent = new Intent();
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 730);
intent.putExtra("aspectY", 1115);
intent.putExtra("outputX", 730);
intent.putExtra("outputY", 1115);
intent.putExtra(MediaStore.EXTRA_OUTPUT, getTempFile());
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
if(item==0)
{
intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, PICK_FROM_CAMERA);
}
else if(item==1)
{
intent.setAction(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, SELECT_PICTURE);
}
}
private Uri getTempFile()
{
muri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),"Image_" + String.Valueof(System.currentTimeMillis()) + ".jpg"));
return muri;
}
});
final AlertDialog alert = builder.create();
((Button) findViewById(R.id.button)).setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View view)
{
alert.show();
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
switch(requestCode)
{
case PICK_FROM_CAMERA : if (resultCode == RESULT_OK)
{
String filePath= muri.getPath();
Toast.makeText(this, filePath, Toast.LENGTH_SHORT).show();
Bitmap selectedImage = BitmapFactory.decodeFile(filePath);
ImageView image = (ImageView)findViewById(R.id.selectedimage);
image.setImageBitmap(selectedImage);
}
break;
case SELECT_PICTURE : if (resultCode == RESULT_OK)
{
String filePath= muri.getPath();
Toast.makeText(this, filePath, Toast.LENGTH_SHORT).show();
Bitmap selectedImage = BitmapFactory.decodeFile(filePath);
ImageView image = (ImageView)findViewById(R.id.selectedimage);
image.setImageBitmap(selectedImage);
}
break;
default:
break;
}
}
}
在 PICK_FROM_CAMERA 中,当我调试它时,它显示 String filePath= muri.getPath(); 处出现了 NULLPOINTEREXCEPTION。但是在 getTempFile() 中它显示了 muri 的值。有人能帮我修复代码中的错误吗?我遇到了很大的麻烦。