我想使用Android图库打开特定文件夹中的所有图片。我在一个老问题中找到了一个解决方案,但它没有用。代码是:
public class MainActivity extends Activity implements MediaScannerConnectionClient {
public String[] allFiles;
private String SCAN_PATH;
private static final String FILE_TYPE = "image/*";
private MediaScannerConnection conn;
private String folderName = "MyAPP";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.album);
File folder = new File("/sdcard/"+folderName+"/");
allFiles = folder.list();
SCAN_PATH = Environment.getExternalStorageDirectory().toString()
+ "/"+folderName+"/" + allFiles[0];
Button scanBtn = (Button) findViewById(R.id.button1);
scanBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
startScan();
}
});
}
private void startScan() {
if (conn != null) {
conn.disconnect();
}
conn = new MediaScannerConnection(this, this);
conn.connect();
}
public void onMediaScannerConnected() {
conn.scanFile(SCAN_PATH, FILE_TYPE);
}
public void onScanCompleted(String path, Uri uri) {
try {
if (uri != null) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setData(uri);
startActivity(intent);
}
} finally {
conn.disconnect();
conn = null;
}
}
}
使用此代码我收到此错误:
08-14 11:09:20.093: W/ContentResolver(25151): Failed to get type for: content://media/external/images/media/10471 (Unknown URL : content://media/external/images/media/10471)
08-14 11:09:20.093: E/JavaBinder(25151): *** Uncaught remote exception! (Exceptions are not yet supported across processes.)
08-14 11:09:20.093: E/JavaBinder(25151): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.GET_CONTENT dat=content://media/external/images/media/10471 }
08-14 11:09:20.093: E/JavaBinder(25151): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1545)
08-14 11:09:20.093: E/JavaBinder(25151): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1416)
08-14 11:09:20.093: E/JavaBinder(25151): at android.app.Activity.startActivityForResult(Activity.java:3351)
08-14 11:09:20.093: E/JavaBinder(25151): at android.app.Activity.startActivityForResult(Activity.java:3312)
08-14 11:09:20.093: E/JavaBinder(25151): at android.app.Activity.startActivity(Activity.java:3522)
08-14 11:09:20.093: E/JavaBinder(25151): at android.app.Activity.startActivity(Activity.java:3490)
08-14 11:09:20.093: E/JavaBinder(25151): at com.example.camtest.MainActivity.onScanCompleted(MainActivity.java:64)
08-14 11:09:20.093: E/JavaBinder(25151): at android.media.MediaScannerConnection$1.scanCompleted(MediaScannerConnection.java:53)
08-14 11:09:20.093: E/JavaBinder(25151): at android.media.IMediaScannerListener$Stub.onTransact(IMediaScannerListener.java:60)
08-14 11:09:20.093: E/JavaBinder(25151): at android.os.Binder.execTransact(Binder.java:367)
08-14 11:09:20.093: E/JavaBinder(25151): at dalvik.system.NativeStart.run(Native Method)
如果我可以使用此代码,但我可以使用您建议我的任何其他想法
答案 0 :(得分:1)
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setData(uri);
startActivity(intent);
上面使用的代码是在图库中打开图片,但不会将uri传递给图库以打开它。 如果您想按图库查看文件夹中的图片,我会向您介绍How to open gallery to show images in a specific directory,希望它会有所帮助。
答案 1 :(得分:1)
这是实际正确的解决方案:
秘诀是找到您的文件夹所代表的存储桶/相册。成功完成MediaScan后会显示存储桶,因此请确保首次扫描您要显示的所有图像/视频,如上所示。
假设我在/ sdcard / myapp / myappsmediafolder 中有一个索引文件夹:
String bucketId = "";
final String[] projection = new String[] {"DISTINCT " + MediaStore.Images.Media.BUCKET_DISPLAY_NAME + ", " + MediaStore.Images.Media.BUCKET_ID};
final Cursor cur = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, null, null, null);
while (cur != null && cur.moveToNext()) {
final String bucketName = cur.getString((cur.getColumnIndex(MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME)));
if (bucketName.equals("myappsmediafolder")) {
bucketId = cur.getString((cur.getColumnIndex(MediaStore.Images.ImageColumns.BUCKET_ID)));
break;
}
}
现在我们的专辑中有了bucketId,我们可以用简单的意图打开它。
过滤视频文件:
Uri mediaUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
过滤图像文件:
Uri mediaUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
...
if (bucketId.length() > 0) {
mediaUri = mediaUri.buildUpon()
.authority("media")
.appendQueryParameter("bucketId", bucketId)
.build();
}
Intent intent = new Intent(Intent.ACTION_VIEW, mediaUri);
startActivity(intent);
我可以使用内置的图库应用验证此功能。里程可能会因其他应用程序而异,例如Google相册。
我还没有想出如何不过滤图像/视频,即使在图库中你可以选择一个没有过滤器的特定相册。
我通过查看图库应用程序的AOSP来源来解决这个问题。
此问题也与以下内容重复:Gallery with folder filter
答案 2 :(得分:0)
点击按钮
尝试此操作 browse.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
您可以将此选定图像设置到您的应用程序中,如下所示
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
picturePath = cursor.getString(columnIndex);
cursor.close();
imageView = (ImageView) findViewById(R.id.property_image);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}}
在第一个代码块中,我使用startActivityForResult(i,RESULT_LOAD_IMAGE);这个返回结果为被调用的活动,我们可以通过第二个代码块获得此结果,并在ImageView中设置所选图像
答案 3 :(得分:0)
我已经从特定的文件夹中检索了图像路径,并将其显示在回收站视图中。该代码在Kotlin中,但是您可以从
private fun getAllShownImagesPath(): ArrayList<String> {
var filePath: ArrayList<String> = ArrayList<String>()
val path = File(getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).path, "BacFo Camera")
if (path.exists()) {
for (i in path.list().iterator()) {
filePath?.add("" + path.toString() + "/" + i)
}
}
return filePath!!
}
因此,现在您有了图像路径列表,可以使用回收站视图适配器将其传递到回收站视图。容易:-)