本文介紹了如何從圖庫(kù)中檢索圖像？的處理方法，對(duì)大家解決問題具有一定的參考價(jià)值，需要的朋友們下面隨著小編來一起學(xué)習(xí)吧！
問題描述
我正在嘗試從Android的圖庫(kù)中檢索圖像，但不幸的是，它在允許的情況下失敗了。
這是我的代碼：
public void loadImagefromGallery(View view) {
// Create intent to Open Image applications like Gallery, Google Photos
Intent galleryIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
// Start the Intent
startActivityForResult(galleryIntent, RESULT_LOAD_IMG);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try {
// When an Image is picked
if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK
&& null != data) {
// Get the Image from data
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
// Get the cursor
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
// Move to first row
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
Toast.makeText(this, "Image picked" +
columnIndex,
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "You haven't picked Image",
Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG)
.show();
Log.d("ERROR",e.getMessage());
}
androidManifest.xml：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.melas.app_3" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<application
android:name=".StartApps"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/Theme.AppCompat.NoActionBar" >
<meta-data
android:name="com.parse.APPLICATION_ID"
android:value="" />
<meta-data
android:name="com.parse.CLIENT_KEY"
android:value="" />
<activity
android:name=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Register" >
</activity>
<activity android:name=".Register2" >
</activity>
<activity android:name=".LoginActivity" >
</activity>
錯(cuò)誤：
12-28 15:15:07.100 1847-1859/android.process.media E/DatabaseUtils: Writing exception to parcel
12-28 15:15:07.100 1847-1859/android.process.media E/DatabaseUtils: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/images/media/28 from pid=13141, uid=10060 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()
12-28 15:15:07.100 1847-1859/android.process.media E/DatabaseUtils: at android.content.ContentProvider.enforceReadPermissionInner(ContentProvider.java:605)
12-28 15:15:07.100 1847-1859/android.process.media E/DatabaseUtils: at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:480)
12-28 15:15:07.100 1847-1859/android.process.media E/DatabaseUtils: at android.content.ContentProvider$Transport.query(ContentProvider.java:211)
12-28 15:15:07.100 1847-1859/android.process.media E/DatabaseUtils: at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:112)
12-28 15:15:07.100 1847-1859/android.process.media E/DatabaseUtils: at android.os.Binder.execTransact(Binder.java:453)
推薦答案
它可以工作，但我嘗試檢索文件名以進(jìn)行分析…
public void loadImagefromGallery(View view) {
Intent galleryIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
// Start the Intent
startActivityForResult(galleryIntent, RESULT_LOAD_IMG);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
txttest = (TextView)findViewById(R.id.textViewtest);
ImageView ig=(ImageView)findViewById(R.id.imageViewTest);
try {
// When an Image is picked
if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK
&& null != data) {
// Get the Image from data
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
// Get the cursor
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
// Move to first row
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
Bitmap bitmap = BitmapFactory.decodeFile(selectedImage.toString());
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] image = stream.toByteArray();
Glide.with(this)
.load(selectedImage)
.into(ig);
Toast.makeText(this, "Image picked" +
selectedImage,
Toast.LENGTH_LONG).show();
//txttest.setText();
} else {
Toast.makeText(this, "You haven't picked Image",
Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG)
.show();
Log.d("ERROR", e.getMessage());
}
}
這篇關(guān)于如何從圖庫(kù)中檢索圖像？的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，
