我在过去的一周里尝试了大部分stackoverflow线程,但没有找到一个全面的解决方案,但所有的线程都对我有所帮助。这是我测试过的工作代码,在Android 11、12和13(Google Pixex 6a)中都可以运行。
AndroidManifest.xml将包含以下内容
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"/>
</provider>
这是我在provider_paths.xml中提到的内容
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path
name="external"
path="." />
<external-files-path
name="external_files"
path="." />
<cache-path
name="cache"
path="." />
<external-cache-path
name="external_cache"
path="." />
<files-path
name="files"
path="." />
</paths>
在 onclick 事件上调用以下方法
dispatchTakePictureIntent();
在onActivityResult中
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch(requestCode) {
case STApplication.SHOW_TAKEPICTURE:
if (resultCode == Activity.RESULT_OK) {
try{
Bitmap imageBitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), OldURI);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
try {
saveImageInAndroidApi29AndAbove(imageBitmap);
} catch (Exception e) {
}
} else {
saveImageInAndroidApi28AndBelow(imageBitmap);
}
btnPicture.setText(getString(R.string.picture_taken));
} catch (Exception e) {
e.printStackTrace();
}
break;
}
}
}
最后,在您的活动类中包含以下所有方法和变量
String currentPhotoPath;
Uri ImageURI;
public static final int SHOW_TAKEPICTURE = 99;
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
}
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(this,
BuildConfig.APPLICATION_ID + ".provider",
photoFile);
ImageURI=photoURI;
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, SHOW_TAKEPICTURE);
}
}
}
private File createImageFile() throws IOException {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName,
".jpg",
storageDir
);
currentPhotoPath = image.getAbsolutePath();
return image;
}
private boolean saveImageInAndroidApi28AndBelow(Bitmap bitmap) {
OutputStream fos;
String imagesDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).toString();
File image = new File(imagesDir, "IMG_" + System.currentTimeMillis() + ".png");
try {
fos = new FileOutputStream(image);
bitmap.compress(Bitmap.CompressFormat.PNG, 95, fos);
Objects.requireNonNull(fos).close();
} catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
}
@NonNull
public Uri saveImageInAndroidApi29AndAbove(@NonNull final Bitmap bitmap) throws IOException {
final ContentValues values = new ContentValues();
values.put(MediaStore.MediaColumns.DISPLAY_NAME, "IMG_" + System.currentTimeMillis());
values.put(MediaStore.MediaColumns.MIME_TYPE, "image/png");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
values.put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_DCIM);
}
final ContentResolver resolver = getApplicationContext().getContentResolver();
Uri uri = null;
try {
final Uri contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
uri = resolver.insert(contentUri, values);
if (uri == null) {
throw new IOException("Failed to create new MediaStore record.");
}
try (final OutputStream stream = resolver.openOutputStream(uri)) {
if (stream == null) {
throw new IOException("Failed to open output stream.");
}
if (!bitmap.compress(Bitmap.CompressFormat.PNG, 95, stream)) {
throw new IOException("Failed to save bitmap.");
}
}
return uri;
} catch (IOException e) {
if (uri != null) {
resolver.delete(uri, null, null);
}
throw e;
}
}