Android 使用 Microsoft Cognitive WAV 文件进行语音转文本
Android Speech to Text using Microsoft Cognitive WAV File
我正在使用 Microsoft Cognitive Speech API 在 Android 中实施文本转语音。当我们使用麦克风输入时它可以工作，但它不适用于 WAV 文件。它坠毁了。我要附上 Android 代码。
package com.devstop.speechtotext;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import com.microsoft.cognitiveservices.speech.CancellationReason;
import com.microsoft.cognitiveservices.speech.ResultReason;
import com.microsoft.cognitiveservices.speech.SpeechConfig;
import com.microsoft.cognitiveservices.speech.SpeechRecognitionResult;
import com.microsoft.cognitiveservices.speech.SpeechRecognizer;
import com.microsoft.cognitiveservices.speech.audio.AudioConfig;
import com.microsoft.cognitiveservices.speech.audio.AudioInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;
public class MainActivity extends AppCompatActivity {
private static final int VERIFY_PERMISSION_REQUEST = 200;
public String path;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(checkPermissionArray(Permissions.READ_EXTERNAL_STORAGE)){
}else{
verifyPermission(Permissions.READ_EXTERNAL_STORAGE);
}
}
public void Gallery(View view) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("audio/*"); // specify "audio/mp3" to filter only mp3 files
startActivityForResult(intent, 1);
}
@Override
protected void onActivityResult(int requestCode,int resultCode,Intent data){
if(requestCode == 1){
if(resultCode == RESULT_OK){
//the selected audio.
Uri uri = data.getData();
String path = getPath(uri);
try {
speech(path);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
public void speech(String path) throws ExecutionException, InterruptedException {
// Creates an instance of a speech config with specified
// subscription key and service region. Replace with your own subscription key
// and service region (e.g., "westus").
SpeechConfig config = SpeechConfig.fromSubscription("Ijusthideit", "westus");
AudioConfig audioInput = AudioConfig.fromWavFileInput(path);
SpeechRecognizer recognizer = new SpeechRecognizer(config, audioInput);
{
// Subscribes to events.
recognizer.recognizing.addEventListener((s, e) -> {
System.out.println("RECOGNIZING: Text=" + e.getResult().getText());
});
recognizer.recognized.addEventListener((s, e) -> {
if (e.getResult().getReason() == ResultReason.RecognizedSpeech) {
System.out.println("RECOGNIZED: Text=" + e.getResult().getText());
}
else if (e.getResult().getReason() == ResultReason.NoMatch) {
System.out.println("NOMATCH: Speech could not be recognized.");
}
});
recognizer.canceled.addEventListener((s, e) -> {
System.out.println("CANCELED: Reason=" + e.getReason());
if (e.getReason() == CancellationReason.Error) {
System.out.println("CANCELED: ErrorDetails=" + e.getErrorDetails());
System.out.println("CANCELED: Did you update the subscription info?");
}
});
recognizer.sessionStarted.addEventListener((s, e) -> {
System.out.println("\n Session started event.");
});
recognizer.sessionStopped.addEventListener((s, e) -> {
System.out.println("\n Session stopped event.");
});
// Starts continuous recognition. Uses StopContinuousRecognitionAsync() to stop recognition.
System.out.println("Say something...");
recognizer.startContinuousRecognitionAsync().get();
System.out.println("Press any key to stop");
new Scanner(System.in).nextLine();
recognizer.stopContinuousRecognitionAsync().get();
}
}
private void verifyPermission(String[] permissions) {
ActivityCompat.requestPermissions(this,permissions,VERIFY_PERMISSION_REQUEST);
}
private boolean checkPermissionArray(String[] permissions) {
for (String check : permissions) {
if (!checkPermissions(check)) {
return false;
}
}
return true;
}
private boolean checkPermissions(String permission) {
int permissionRequest = ActivityCompat.checkSelfPermission(getApplicationContext(),permission);
if(permissionRequest != PackageManager.PERMISSION_GRANTED){
return false;
}else{
return true;
}
}
private String getPath( Uri uri ) {
String result = null;
String[] proj = {MediaStore.Images.Media.DATA};
Cursor cursor = getApplicationContext().getContentResolver().query(uri, proj, null, null, null);
if (cursor != null) {
if (cursor.moveToFirst()) {
int column_index = cursor.getColumnIndexOrThrow(proj[0]);
result = cursor.getString(column_index);
}
cursor.close();
}
if (result == null) {
result = "nill";
}
return result;
}
}
当我select wav文件。它崩溃了，logcat 给出了这个。
018-10-16 13:17:47.965 495-495/com.devstop.speechtotext
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.devstop.speechtotext, PID: 495
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent {
dat=content://com.android.providers.media.documents/document/audio:44395
flg=0x1 }} to activity
{com.devstop.speechtotext/com.devstop.speechtotext.MainActivity}:
java.lang.RuntimeException: Exception with an error code: 0x8
(SPXERR_FILE_OPEN_FAILED)
[CALL STACK]# 0: 0x7e407f42f8_ZN9Microsoft17CognitiveServices6Speech4Impl17CSpxWavFileReader4OpenEPKw
# 1: 0x7e407f6924 _ZN9Microsoft17CognitiveServices6Speech4Impl15CSpxWavFilePump10EnsureFileEPKw
# 2: 0x7e407f702c _ZThn64_N9Microsoft17CognitiveServices6Speech4Impl15CSpxWavFilePump4OpenEPKw
# 3: 0x7e407db8c4 _ZN9Microsoft17CognitiveServices6Speech4Impl22CSpxAudioStreamSession12InitFromFileEPKw
# 4: 0x7e407b2b7c _ZN9Microsoft17CognitiveServices6Speech4Impl20CSpxSpeechApiFactory31InitSessionFromAudioInputConfigENSt6__ndk110shared_ptrINS2_11ISpxSessionEEENS5_INS2_15ISpxAudioConfigEEE
# 5: 0x7e407b1450 _ZN9Microsoft17CognitiveServices6Speech4Impl20CSpxSpeechApiFactory34CreateRecognizerFromConfigInternalEPKcS5_S5_NS1_12OutputFormatENSt6__ndk110shared_ptrINS2_15ISpxAudioConfigEEE
# 6: 0x7e407b1b80 _ZThn48_N9Microsoft17CognitiveServices6Speech4Impl20CSpxSpeechApiFactory32CreateSpeechRecognizerFromConfigEPKcNS1_12OutputFormatENSt6__ndk110shared_ptrINS2_15ISpxAudioConfigEEE
# 7: 0x7e40792fd0 recognizer_create_speech_recognizer_from_config
# 8: 0x7e40beae4c _ZN9Microsoft17CognitiveServices6Speech16SpeechRecognizer10FromConfigENSt6__ndk110shared_ptrINS1_12SpeechConfigEEENS4_INS1_5Audio11AudioConfigEEE
# 9: 0x7e40bcf82c Java_com_microsoft_cognitiveservices_speech_internal_carbon_1javaJNI_SpeechRecognizer_1FromConfig_1_1SWIG_10
#10: 0x7e622fc704 ???
#11: 0x7e622f363c ???
#12: 0x7e61ec20b8 _ZN3art9ArtMethod6InvokeEPNS_6ThreadEPjjPNS_6JValueEPKc
#13: 0x7e6206c1e0 _ZN3art11interpreter34ArtInterpreterToCompiledCodeBridgeEPNS_6ThreadEPNS_9ArtMethodEPKNS_7DexFile8CodeItemEPNS_11ShadowFrameEPNS_6JValueE
#14: 0x7e62067718 _ZN3art11interpreter6DoCallILb1ELb0EEEbPNS_9ArtMethodEPNS_6ThreadERNS_11ShadowFrameEPKNS_11InstructionEtPNS_6JValueE
#15: 0x7e622dd9dc MterpInvokeStaticRange
#16: 0x7e622e5198 ExecuteMterpImpl
#17: 0x7e62047624 ???
#18: 0x7e6204dd24 _ZN3art11interpreter33ArtInterpreterToInterpreterBridgeEPNS_6ThreadEPKNS_7DexFile8CodeItemEPNS_11ShadowFrameEPNS_6JValueE
#19: 0x7e62066888 _ZN3art11interpreter6DoCallILb0ELb0EEEbPNS_9ArtMethodEPNS_6ThreadERNS_11ShadowFrameEPKNS_11InstructionEtPNS_6JValueE
#20: 0x7e622dc134 MterpInvokeStatic
#21: 0x7e622e4e98 ExecuteMterpImpl
#22: 0x7e62047624 ???
#23: 0x7e6204dd24 _ZN3art11interpreter33ArtInterpreterToInterpreterBridgeEPNS_6ThreadEPKNS_7DexFile8CodeItemEPNS_11ShadowFrameEPNS_6JValueE
#24: 0x7e62066888 _ZN3art11interpreter6DoCallILb0ELb0EEEbPNS_9ArtMethodEPNS_6ThreadERNS_11ShadowFrameEPKNS_11InstructionEtPNS_6JValueE
#25: 0x7e622dbe7c MterpInvokeDirect
#26: 0x7e622e4e18 ExecuteMterpImpl
#27: 0x7e62047624 ??? at com.microsoft.cognitiveservices.speech.internal.carbon_javaJNI.SpeechRecognizer_FromConfig__SWIG_0(Native
Method)
at com.microsoft.cognitiveservices.speech.internal.SpeechRecognizer.FromConfig(SpeechRecognizer.java:41)
at com.microsoft.cognitiveservices.speech.SpeechRecognizer.(SpeechRecognizer.java:88)
at com.devstop.speechtotext.MainActivity.speech(MainActivity.java:96)
at com.devstop.speechtotext.MainActivity.onActivityResult(MainActivity.java:71)
at android.app.Activity.dispatchActivityResult(Activity.java:7690)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4928)
我不知道这里发生了什么。我传递给语音功能的文件路径是正确的。但它仍然崩溃。
任何帮助将不胜感激。
谢谢
我发现我做错了什么。我从 URI 获取的路径不正确。
您可以使用以下方法从 URI 中获取正确的路径。
@SuppressLint("NewApi")
public String getFilePath(Context context, Uri uri) throws URISyntaxException {
String selection = null;
String[] selectionArgs = null;
// Uri is different in versions after KITKAT (Android 4.4), we need to
if (Build.VERSION.SDK_INT >= 19 && DocumentsContract.isDocumentUri(context.getApplicationContext(), uri)) {
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
return Environment.getExternalStorageDirectory() + "/" + split[1];
} else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
uri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
} else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("image".equals(type)) {
uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
selection = "_id=?";
selectionArgs = new String[]{
split[1]
};
}
}
if ("content".equalsIgnoreCase(uri.getScheme())) {
String[] projection = {
MediaStore.Images.Media.DATA
};
Cursor cursor = null;
try {
cursor = context.getContentResolver()
.query(uri, projection, selection, selectionArgs, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
if (cursor.moveToFirst()) {
return cursor.getString(column_index);
}
} catch (Exception e) {
}
} else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
这个回答对我有帮助。
不要忘记为原作者背书。
我正在使用 Microsoft Cognitive Speech API 在 Android 中实施文本转语音。当我们使用麦克风输入时它可以工作，但它不适用于 WAV 文件。它坠毁了。我要附上 Android 代码。
package com.devstop.speechtotext;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import com.microsoft.cognitiveservices.speech.CancellationReason;
import com.microsoft.cognitiveservices.speech.ResultReason;
import com.microsoft.cognitiveservices.speech.SpeechConfig;
import com.microsoft.cognitiveservices.speech.SpeechRecognitionResult;
import com.microsoft.cognitiveservices.speech.SpeechRecognizer;
import com.microsoft.cognitiveservices.speech.audio.AudioConfig;
import com.microsoft.cognitiveservices.speech.audio.AudioInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;
public class MainActivity extends AppCompatActivity {
private static final int VERIFY_PERMISSION_REQUEST = 200;
public String path;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(checkPermissionArray(Permissions.READ_EXTERNAL_STORAGE)){
}else{
verifyPermission(Permissions.READ_EXTERNAL_STORAGE);
}
}
public void Gallery(View view) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("audio/*"); // specify "audio/mp3" to filter only mp3 files
startActivityForResult(intent, 1);
}
@Override
protected void onActivityResult(int requestCode,int resultCode,Intent data){
if(requestCode == 1){
if(resultCode == RESULT_OK){
//the selected audio.
Uri uri = data.getData();
String path = getPath(uri);
try {
speech(path);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
public void speech(String path) throws ExecutionException, InterruptedException {
// Creates an instance of a speech config with specified
// subscription key and service region. Replace with your own subscription key
// and service region (e.g., "westus").
SpeechConfig config = SpeechConfig.fromSubscription("Ijusthideit", "westus");
AudioConfig audioInput = AudioConfig.fromWavFileInput(path);
SpeechRecognizer recognizer = new SpeechRecognizer(config, audioInput);
{
// Subscribes to events.
recognizer.recognizing.addEventListener((s, e) -> {
System.out.println("RECOGNIZING: Text=" + e.getResult().getText());
});
recognizer.recognized.addEventListener((s, e) -> {
if (e.getResult().getReason() == ResultReason.RecognizedSpeech) {
System.out.println("RECOGNIZED: Text=" + e.getResult().getText());
}
else if (e.getResult().getReason() == ResultReason.NoMatch) {
System.out.println("NOMATCH: Speech could not be recognized.");
}
});
recognizer.canceled.addEventListener((s, e) -> {
System.out.println("CANCELED: Reason=" + e.getReason());
if (e.getReason() == CancellationReason.Error) {
System.out.println("CANCELED: ErrorDetails=" + e.getErrorDetails());
System.out.println("CANCELED: Did you update the subscription info?");
}
});
recognizer.sessionStarted.addEventListener((s, e) -> {
System.out.println("\n Session started event.");
});
recognizer.sessionStopped.addEventListener((s, e) -> {
System.out.println("\n Session stopped event.");
});
// Starts continuous recognition. Uses StopContinuousRecognitionAsync() to stop recognition.
System.out.println("Say something...");
recognizer.startContinuousRecognitionAsync().get();
System.out.println("Press any key to stop");
new Scanner(System.in).nextLine();
recognizer.stopContinuousRecognitionAsync().get();
}
}
private void verifyPermission(String[] permissions) {
ActivityCompat.requestPermissions(this,permissions,VERIFY_PERMISSION_REQUEST);
}
private boolean checkPermissionArray(String[] permissions) {
for (String check : permissions) {
if (!checkPermissions(check)) {
return false;
}
}
return true;
}
private boolean checkPermissions(String permission) {
int permissionRequest = ActivityCompat.checkSelfPermission(getApplicationContext(),permission);
if(permissionRequest != PackageManager.PERMISSION_GRANTED){
return false;
}else{
return true;
}
}
private String getPath( Uri uri ) {
String result = null;
String[] proj = {MediaStore.Images.Media.DATA};
Cursor cursor = getApplicationContext().getContentResolver().query(uri, proj, null, null, null);
if (cursor != null) {
if (cursor.moveToFirst()) {
int column_index = cursor.getColumnIndexOrThrow(proj[0]);
result = cursor.getString(column_index);
}
cursor.close();
}
if (result == null) {
result = "nill";
}
return result;
}
}
当我select wav文件。它崩溃了，logcat 给出了这个。
018-10-16 13:17:47.965 495-495/com.devstop.speechtotext E/AndroidRuntime: FATAL EXCEPTION: main Process: com.devstop.speechtotext, PID: 495 java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://com.android.providers.media.documents/document/audio:44395 flg=0x1 }} to activity {com.devstop.speechtotext/com.devstop.speechtotext.MainActivity}: java.lang.RuntimeException: Exception with an error code: 0x8 (SPXERR_FILE_OPEN_FAILED) [CALL STACK]# 0: 0x7e407f42f8_ZN9Microsoft17CognitiveServices6Speech4Impl17CSpxWavFileReader4OpenEPKw # 1: 0x7e407f6924 _ZN9Microsoft17CognitiveServices6Speech4Impl15CSpxWavFilePump10EnsureFileEPKw # 2: 0x7e407f702c _ZThn64_N9Microsoft17CognitiveServices6Speech4Impl15CSpxWavFilePump4OpenEPKw # 3: 0x7e407db8c4 _ZN9Microsoft17CognitiveServices6Speech4Impl22CSpxAudioStreamSession12InitFromFileEPKw # 4: 0x7e407b2b7c _ZN9Microsoft17CognitiveServices6Speech4Impl20CSpxSpeechApiFactory31InitSessionFromAudioInputConfigENSt6__ndk110shared_ptrINS2_11ISpxSessionEEENS5_INS2_15ISpxAudioConfigEEE # 5: 0x7e407b1450 _ZN9Microsoft17CognitiveServices6Speech4Impl20CSpxSpeechApiFactory34CreateRecognizerFromConfigInternalEPKcS5_S5_NS1_12OutputFormatENSt6__ndk110shared_ptrINS2_15ISpxAudioConfigEEE # 6: 0x7e407b1b80 _ZThn48_N9Microsoft17CognitiveServices6Speech4Impl20CSpxSpeechApiFactory32CreateSpeechRecognizerFromConfigEPKcNS1_12OutputFormatENSt6__ndk110shared_ptrINS2_15ISpxAudioConfigEEE # 7: 0x7e40792fd0 recognizer_create_speech_recognizer_from_config # 8: 0x7e40beae4c _ZN9Microsoft17CognitiveServices6Speech16SpeechRecognizer10FromConfigENSt6__ndk110shared_ptrINS1_12SpeechConfigEEENS4_INS1_5Audio11AudioConfigEEE # 9: 0x7e40bcf82c Java_com_microsoft_cognitiveservices_speech_internal_carbon_1javaJNI_SpeechRecognizer_1FromConfig_1_1SWIG_10 #10: 0x7e622fc704 ??? #11: 0x7e622f363c ??? #12: 0x7e61ec20b8 _ZN3art9ArtMethod6InvokeEPNS_6ThreadEPjjPNS_6JValueEPKc #13: 0x7e6206c1e0 _ZN3art11interpreter34ArtInterpreterToCompiledCodeBridgeEPNS_6ThreadEPNS_9ArtMethodEPKNS_7DexFile8CodeItemEPNS_11ShadowFrameEPNS_6JValueE #14: 0x7e62067718 _ZN3art11interpreter6DoCallILb1ELb0EEEbPNS_9ArtMethodEPNS_6ThreadERNS_11ShadowFrameEPKNS_11InstructionEtPNS_6JValueE #15: 0x7e622dd9dc MterpInvokeStaticRange #16: 0x7e622e5198 ExecuteMterpImpl #17: 0x7e62047624 ??? #18: 0x7e6204dd24 _ZN3art11interpreter33ArtInterpreterToInterpreterBridgeEPNS_6ThreadEPKNS_7DexFile8CodeItemEPNS_11ShadowFrameEPNS_6JValueE #19: 0x7e62066888 _ZN3art11interpreter6DoCallILb0ELb0EEEbPNS_9ArtMethodEPNS_6ThreadERNS_11ShadowFrameEPKNS_11InstructionEtPNS_6JValueE #20: 0x7e622dc134 MterpInvokeStatic #21: 0x7e622e4e98 ExecuteMterpImpl #22: 0x7e62047624 ??? #23: 0x7e6204dd24 _ZN3art11interpreter33ArtInterpreterToInterpreterBridgeEPNS_6ThreadEPKNS_7DexFile8CodeItemEPNS_11ShadowFrameEPNS_6JValueE #24: 0x7e62066888 _ZN3art11interpreter6DoCallILb0ELb0EEEbPNS_9ArtMethodEPNS_6ThreadERNS_11ShadowFrameEPKNS_11InstructionEtPNS_6JValueE #25: 0x7e622dbe7c MterpInvokeDirect #26: 0x7e622e4e18 ExecuteMterpImpl #27: 0x7e62047624 ??? at com.microsoft.cognitiveservices.speech.internal.carbon_javaJNI.SpeechRecognizer_FromConfig__SWIG_0(Native Method) at com.microsoft.cognitiveservices.speech.internal.SpeechRecognizer.FromConfig(SpeechRecognizer.java:41) at com.microsoft.cognitiveservices.speech.SpeechRecognizer.(SpeechRecognizer.java:88) at com.devstop.speechtotext.MainActivity.speech(MainActivity.java:96) at com.devstop.speechtotext.MainActivity.onActivityResult(MainActivity.java:71) at android.app.Activity.dispatchActivityResult(Activity.java:7690) at android.app.ActivityThread.deliverResults(ActivityThread.java:4928)
我不知道这里发生了什么。我传递给语音功能的文件路径是正确的。但它仍然崩溃。 任何帮助将不胜感激。 谢谢
我发现我做错了什么。我从 URI 获取的路径不正确。 您可以使用以下方法从 URI 中获取正确的路径。
@SuppressLint("NewApi")
public String getFilePath(Context context, Uri uri) throws URISyntaxException {
String selection = null;
String[] selectionArgs = null;
// Uri is different in versions after KITKAT (Android 4.4), we need to
if (Build.VERSION.SDK_INT >= 19 && DocumentsContract.isDocumentUri(context.getApplicationContext(), uri)) {
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
return Environment.getExternalStorageDirectory() + "/" + split[1];
} else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
uri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
} else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("image".equals(type)) {
uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
selection = "_id=?";
selectionArgs = new String[]{
split[1]
};
}
}
if ("content".equalsIgnoreCase(uri.getScheme())) {
String[] projection = {
MediaStore.Images.Media.DATA
};
Cursor cursor = null;
try {
cursor = context.getContentResolver()
.query(uri, projection, selection, selectionArgs, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
if (cursor.moveToFirst()) {
return cursor.getString(column_index);
}
} catch (Exception e) {
}
} else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
这个回答对我有帮助。
不要忘记为原作者背书。