我正在研究从画廊中捕获照片或挑选图像并在回收器视图中显示的项目，该应用程序在Android棒棒糖中运行良好，但是一旦单击相机按钮，棉花糖就会崩溃，这是例外
Caused by: java.lang.SecurityException: Permission Denial: writing com.android.providers.media.MediaProvider uri content://media/external/images/media from pid=1983, uid=10060 requires android.permission.WRITE_EXTERNAL_STORAGE, or grantUriPermission()
这是代码：
表现
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.urjapawar.bevypart2">
<uses-permission tools:node="replace" android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission tools:node="replace" android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-feature
android:name="android.hardware.camera"
android:required="false"/>
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme"
>
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity><!-- ATTENTION: This was auto-generated to add Google Play services to your project for
App Indexing. See https://g.co/AppIndexing/AndroidStudio for more information. -->
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
</application>
</manifest>
Images.java
public class Images {
String path;
public void setPath(String path) { this.path = path; }
public String getPath() {
return path;
}
/**
* Gets path.
*
* @return Value of path.
*/
@Override public String toString() {
return "\nPath:" + path;
}
}
MainActivity.java
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.View;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ArrayList<Images> images;
private ImageAdapter imageAdapter;
private RecyclerView rv;
private LinearLayoutManager llm;
private Uri mCapturedImageURI;
private static final int RESULT_LOAD_IMAGE = 1;
private static final int REQUEST_IMAGE_CAPTURE = 2;
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
images = new ArrayList<>();
imageAdapter = new ImageAdapter(images);
rv = (RecyclerView) findViewById(R.id.rv);
llm = new LinearLayoutManager(this);
rv.setLayoutManager(llm);
imageAdapter = new ImageAdapter(images);
rv.setAdapter(imageAdapter);
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}
public void activeCamera(View view) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
String fileName = "temp.jpg";
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
mCapturedImageURI = getContentResolver()
.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
values);
takePictureIntent
.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
public void activeGallery(View view) {
Intent intent = new Intent(Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, RESULT_LOAD_IMAGE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case RESULT_LOAD_IMAGE:
Uri selectedImage = null;
if (requestCode == RESULT_LOAD_IMAGE &&
resultCode == RESULT_OK && null != data) {
if (Build.VERSION.SDK_INT < 19) {
selectedImage = data.getData();
} else {
selectedImage = data.getData();
}
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver()
.query(selectedImage, filePathColumn, null, null,
null);
if (cursor != null && cursor.getCount() > 0) {
cursor.moveToFirst();
}
// cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
Images image = new Images();
image.setPath(picturePath);
images.add(image);
}
case REQUEST_IMAGE_CAPTURE:
if (requestCode == REQUEST_IMAGE_CAPTURE &&
resultCode == RESULT_OK) {
String[] projection = {MediaStore.Images.Media.DATA};
Cursor cursor =
getContentResolver().query(mCapturedImageURI, projection, null,
null, null);
int column_index_data = cursor.getColumnIndexOrThrow(
MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String picturePath = cursor.getString(column_index_data);
Images image = new Images();
image.setPath(picturePath);
images.add(image);
cursor.close();
}
}
}
}
ImageAdapter.java
import android.graphics.BitmapFactory;
import android.media.ThumbnailUtils;
import android.net.Uri;
import android.support.v7.widget.*;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import java.util.List;
public class ImageAdapter extends android.support.v7.widget.RecyclerView.Adapter<ImageAdapter.ImgViewHolder> {
List<Images> images;
ImageAdapter(List<Images> img){
this.images = img;
}
public class ImgViewHolder extends android.support.v7.widget.RecyclerView.ViewHolder
{
ImageView personPhoto;
CardView cv;
public ImgViewHolder(View itemView) {
super(itemView);
cv = (CardView)itemView.findViewById(R.id.card_view);
personPhoto=(ImageView)itemView.findViewById(R.id.thumbnail);
}
}
@Override
public ImgViewHolder onCreateViewHolder(final ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.single_card, viewGroup, false);
ImgViewHolder pvh = new ImgViewHolder(v);
return pvh;
}
@Override
public int getItemCount() {
return images.size();
}
@Override
public void onBindViewHolder(ImgViewHolder holder, int i) {
Images image = images.get(i);
final int THUMBSIZE = 96;
// viewHolder.imgIcon.setImageURI(Uri.fromFile(new File(image
// .getPath())));
holder.personPhoto.setImageBitmap(ThumbnailUtils
.extractThumbnail(BitmapFactory.decodeFile(image.getPath()),
THUMBSIZE, THUMBSIZE));
// holder.personPhoto.setImageURI(Uri.parse("file://" + images.getPath() + "/" + mDataset[position]));
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
}
我检查了很多答案，但无法解决，请帮忙！同样，从图库空白卡中选择图像时，显示为棉花糖（无图像内容），它表示在访问游标之前确保已正确初始化游标。虽然在棒棒糖之一中效果很好。
任何建议将不胜感激。
最佳答案
由于android 6 +版本会检查运行时权限，因此您必须在代码中添加Camera权限。
public void getCameraPermission(){
if (!checkPermission()) {
requestPermission();
}
}
private boolean checkPermission(){
int result = ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA);
if (result == PackageManager.PERMISSION_GRANTED){
return true;
} else {
return false;
}
}
private void requestPermission(){
if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.CAMERA)){
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA}, PERMISSION_REQUEST_CODE);
} else {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA}, PERMISSION_REQUEST_CODE);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case PERMISSION_REQUEST_CODE:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(MainActivity.this,"Permission granted",Toast.LENGTH_SHORT).show();
//store permission in shared pref
}
else {
Toast.makeText(MainActivity.this,"Permission denied",Toast.LENGTH_SHORT).show();
//store permission in shared pref
}
break;
}
}
关于java - 应用程序由于java.lang.SecurityException而崩溃，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37476222/