SecurityException而当机

SecurityException而当机

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应用程式因java.lang.SecurityException而当机

本文介绍了应用程式因java.lang.SecurityException而当机的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

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给出异常，则棉花糖就会崩溃

I am working on the project of capturing photos or picking images from gallery and show it in the recycler view, the app is working good in Android-lollipop but crashes in marshmallow one as soon as camera button is clicked giving the exception

 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:清单 

<?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，在从图库空白卡中选择图像时，显示为棉花糖(无图像内容)，它说确保从光标访问数据之前，游标已正确初始化.在棒棒糖中正常工作.任何建议将不胜感激.

I have checked many answers but not able to fix it, kindly help! Also while selecting images from gallery blank card shows up in marshmallow (no image content), it says Make sure the Cursor is initialized correctly before accessing data from it. while it works fine in lollipop one.Any suggestions will be deeply appreciated.

推荐答案

由于android 6 +版本会检查运行时权限，因此必须在代码中添加Camera权限.

You must put Camera permission in code since android 6 + version checks for runtime permission. 

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;
    }
}

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08-11 08:15
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