こんにちは、私は現在ライブ壁紙に取り組んでおり、ユーザーが自分のエフェクトの背後にある画像を選択できるようにします。
現在私は持っています
Intent i = new Intent(Intent.ACTION_PICK, Android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
i.putExtra("crop", "true");
startActivityForResult(i, 1);
そしてその少し下:
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1)
if (resultCode == Activity.RESULT_OK) {
Uri selectedImage = data.getData();
Log.d("IMAGE SEL", "" + selectedImage);
// TODO Do something with the select image URI
SharedPreferences customSharedPreference = getSharedPreferences("imagePref", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = customSharedPreference.edit();
Log.d("HO", "" + selectedImage);
editor.putString("imagePref", getRealPathFromURI(selectedImage));
Log.d("IMAGE SEL", getRealPathFromURI(selectedImage));
editor.commit();
}
}
コードを実行すると、LogcatはselectedImageがnullであることを通知します。私がコメントアウトした場合
i.putExtra("crop", "true"):
Logcatはnullポインタ例外を私に与えません、そして、私はイメージで望むことをすることができます。だから、ここでの問題は何ですか?誰も私がこれを修正する方法を知っていますか?御時間ありがとうございます。
私もこの問題に直面しました。このコードで試すことができます。私にとってはうまくいきます
private static final String TEMP_PHOTO_FILE = "temporary_holder.jpg";
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK,
Android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
photoPickerIntent.setType("image/*");
photoPickerIntent.putExtra("crop", "true");
photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT, getTempUri());
photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(photoPickerIntent, REQ_CODE_PICK_IMAGE);
private Uri getTempUri() {
return Uri.fromFile(getTempFile());
}
private File getTempFile() {
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
File file = new File(Environment.getExternalStorageDirectory(),TEMP_PHOTO_FILE);
try {
file.createNewFile();
} catch (IOException e) {}
return file;
} else {
return null;
}
}
protected void onActivityResult(int requestCode, int resultCode,
Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch (requestCode) {
case REQ_CODE_PICK_IMAGE:
if (resultCode == RESULT_OK) {
if (imageReturnedIntent!=null) {
File tempFile = getTempFile();
String filePath= Environment.getExternalStorageDirectory()
+"/"+TEMP_PHOTO_FILE;
System.out.println("path "+filePath);
Bitmap selectedImage = BitmapFactory.decodeFile(filePath);
_image = (ImageView) findViewById(R.id.image);
_image.setImageBitmap(selectedImage );
if (tempFile.exists()) tempFile.delete();
}
}
}
}
一時ファイルは必要ありません。
protected static final int REQ_CODE_PICK_IMAGE = 1;
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK,
Android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
photoPickerIntent.setType("image/*");
photoPickerIntent.putExtra("crop", "true");
photoPickerIntent.putExtra("return-data", true);
photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(photoPickerIntent, REQ_CODE_PICK_IMAGE);
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch (requestCode) {
case REQ_CODE_PICK_IMAGE:
if (resultCode == RESULT_OK) {
if (imageReturnedIntent!=null) {
Bundle extras = imageReturnedIntent.getExtras();
Bitmap selectedBitmap = extras.getParcelable("data");
imageR = (ImageView) findViewById(R.id.image);
imageR.setImageBitmap(selectedBitmap);
}
}
}
}
このコードは「初心者」に適しています^^
private Bitmap FixBitmap;
Bitmap thePicBitmap;
String ImagePath = "image_path";
String ImagePath_1;
private static final String TEMP_PHOTO_FILE = "temporary_holder.jpg";
private static final int REQ_CODE_PICK_IMAGE = 0;
@Override
public void onClick(View view) {
try {
//intent = new Intent();
// intent = new Intent(Intent.ACTION_PICK,Android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK, Android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
//intent.setAction(Intent.ACTION_GET_CONTENT);
photoPickerIntent.setType("image/*");
photoPickerIntent.putExtra("crop", "true");
photoPickerIntent.putExtra("scale", true);
photoPickerIntent.putExtra("aspectX", 1);
photoPickerIntent.putExtra("aspectY", 1);
// indicate output X and Y
photoPickerIntent.putExtra("outputX", 150);
photoPickerIntent.putExtra("outputY", 100);
photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT, getTempUri());
photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(photoPickerIntent, REQ_CODE_PICK_IMAGE);
} catch (Exception e) {
// Toast.makeText(getApplicationContext(), R.string.imageException, Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
Toast toast = Toast.makeText(Upload_image_text.this, "This device doesn't support the crop action!",
Toast.LENGTH_SHORT);
toast.show();
}
}
private Uri getTempUri() {
return Uri.fromFile(getTempFile());
}
private File getTempFile() {
if (isSDCARDMounted()) {
File f = new File(Environment.getExternalStorageDirectory(),TEMP_PHOTO_FILE);
try {
f.createNewFile();
} catch (IOException e) {
}
return f;
} else {
return null;
}
}
private boolean isSDCARDMounted(){
String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED))
return true;
return false;
}
});
=======================
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch (requestCode) {
case REQ_CODE_PICK_IMAGE:
if (resultCode == RESULT_OK) {
if (imageReturnedIntent!=null){
// File tempFile = getTempFile();
ImagePath_1 = Environment.getExternalStorageDirectory()
+ "/temporary_holder.jpg";
System.out.println("path "+ImagePath_1);
FixBitmap = BitmapFactory.decodeFile(ImagePath_1);
ShowSelectedImage = (ImageView)findViewById(R.id.imageView);
ShowSelectedImage.setImageBitmap(FixBitmap);
}
}
}
}
===============================
@Override
protected String doInBackground(Void... params) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1;
//options.outWidth = 50;
//options.outHeight = 50;
FixBitmap = BitmapFactory.decodeFile(ImagePath_1, options);
//FixBitmap = BitmapFactory.decodeResource(getResources(), R.id.imageView);
byteArrayOutputStream = new ByteArrayOutputStream();
FixBitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream); //compress to 50% of original image quality
byteArray = byteArrayOutputStream.toByteArray();
ConvertImage = Base64.encodeToString(byteArray, Base64.DEFAULT);