这是我的程序,我认为alertdialogue没问题。 但是在我选择了我的图库中的照片后,图片没有改变。 它仍然是我在ImageView中设置的原始照片。 有些人可以帮助我知道问题出在哪里了吗?
public class MainActivity extends Activity{
ImageView img_logo;<br>
protected static final int CAMERA_REQUEST = 0;
protected static final int GALLERY_PICTURE = 1;
private Intent pictureActionIntent = null;
Bitmap bitmap;
Uri selectedImageUri;
String selectedPath;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img_logo= (ImageView) findViewById(R.id.homepic);
img_logo.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startDialog();
}
});
}
private void startDialog() {
AlertDialog.Builder myAlertDialog = new AlertDialog.Builder(this);
myAlertDialog.setTitle("Upload Pictures Option");
myAlertDialog.setMessage("How do you want to set your picture?");
myAlertDialog.setPositiveButton("Gallery",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
pictureActionIntent = new Intent(
Intent.ACTION_GET_CONTENT, null);
pictureActionIntent.setType("image/*");
pictureActionIntent.putExtra("return-data", true);
startActivityForResult(pictureActionIntent,
GALLERY_PICTURE);
}
});
myAlertDialog.setNegativeButton("Camera",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
pictureActionIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(pictureActionIntent,
CAMERA_REQUEST);
}
});
myAlertDialog.show();
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if(data.getData() != null){
selectedImageUri = data.getData();
}else{
Log.d("selectedPath1 : ","Came here its null !");
Toast.makeText(getApplicationContext(), "failed to get Image!", 500).show();
}
if (requestCode == 100 && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
selectedPath = getPath(selectedImageUri);
img_logo.setImageURI(selectedImageUri);
Log.d("selectedPath1 : " ,selectedPath);
}
if (requestCode == 10)
{
selectedPath = getPath(selectedImageUri);
img_logo.setImageURI(selectedImageUri);
Log.d("selectedPath1 : " ,selectedPath);
}
}
Toast toast = Toast.makeText(MainActivity.this, "hiiiii", Toast.LENGTH_LONG);
toast.show();
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
}
答案 0 :(得分:1)
请尝试这种方式,希望这有助于您解决问题。
public class MainActivity extends Activity {
ImageView img_logo;
protected static final int CAMERA_REQUEST = 0;
protected static final int GALLERY_PICTURE = 1;
private String imgPath;
private String selectedPath;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img_logo = (ImageView) findViewById(R.id.homepic);
img_logo.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startDialog();
}
});
}
private void startDialog() {
AlertDialog.Builder myAlertDialog = new AlertDialog.Builder(this);
myAlertDialog.setTitle("Upload Pictures Option");
myAlertDialog.setMessage("How do you want to set your picture?");
myAlertDialog.setPositiveButton("Gallery",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, ""), GALLERY_PICTURE);
}
}
);
myAlertDialog.setNegativeButton("Camera",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
final Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, setImageUri());
startActivityForResult(intent, CAMERA_REQUEST);
}
}
);
myAlertDialog.show();
}
public Uri setImageUri() {
// Store image in dcim
File file = new File(Environment.getExternalStorageDirectory() + "/DCIM/", "image" + new Date().getTime() + ".jpg");
Uri imgUri = Uri.fromFile(file);
this.imgPath = file.getAbsolutePath();
return imgUri;
}
public String getImagePath() {
return imgPath;
}
public String getAbsolutePath(Uri uri) {
if (Build.VERSION.SDK_INT >= 19) {
String id = uri.getLastPathSegment().split(":")[1];
final String[] imageColumns = {MediaStore.Images.Media.DATA};
final String imageOrderBy = null;
Uri tempUri = getUri();
Cursor imageCursor = managedQuery(tempUri, imageColumns,
MediaStore.Images.Media._ID + "=" + id, null, imageOrderBy);
if (imageCursor.moveToFirst()) {
return imageCursor.getString(imageCursor.getColumnIndex(MediaStore.Images.Media.DATA));
} else {
return null;
}
} else {
String[] projection = {MediaStore.MediaColumns.DATA};
@SuppressWarnings("deprecation")
Cursor cursor = managedQuery(uri, projection, null, null, null);
if (cursor != null) {
int column_index = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} else
return null;
}
}
private Uri getUri() {
String state = Environment.getExternalStorageState();
if (!state.equalsIgnoreCase(Environment.MEDIA_MOUNTED))
return MediaStore.Images.Media.INTERNAL_CONTENT_URI;
return MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
if (requestCode == CAMERA_REQUEST) {
img_logo.setImageBitmap(BitmapFactory.decodeFile(getImagePath()));
selectedPath = getImagePath();
} else if (requestCode == GALLERY_PICTURE) {
img_logo.setImageBitmap(BitmapFactory.decodeFile(getAbsolutePath(data.getData())));
selectedPath = getAbsolutePath(data.getData());
}
Toast toast = Toast.makeText(MainActivity.this, "hiiiii", Toast.LENGTH_LONG);
toast.show();
}
}
}
Add this <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> in AndroidManifest.xml