Question

我正在使用以下代码的联系人抓取应用程序我在第17行获得 Android运行时：致命异常：主错误。

package com.example.alpesh_pc.contactlist;

import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.widget.Toast;

public class MainActivity extends Activity
{
    public Cursor cursor;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        cursor=this.getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
        if(cursor.getCount()>0)
        {
            Toast.makeText(this, "Seccess", Toast.LENGTH_LONG).show();
        }

    }
}

下面的

是我的logcat

E / AndroidRuntime：致命异常：主要处理：com.example.alpesh_pc.contactlist，PID：3833 java.lang.RuntimeException：无法启动活动ComponentInfo {com.example.alpesh_pc.contactlist / com.example.alpesh_pc.contactlist.MainActivity}：java.lang.SecurityException：Permission Denial：打开提供程序com.android.providers.contacts。来自ProcessRecord的ContactsProvider2 {6970ad0 3833：com.example.alpesh_pc.contactlist / u0a67}（pid = 3833，uid = 10067）需要android.permission.READ_CONTACTS或android.permission.WRITE_CONTACTS 在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2646）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2707）在android.app.ActivityThread.-wrap12（ActivityThread.java）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1460）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6077） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:865）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:755）引起：java.lang.SecurityException：权限拒绝：从ProcessRecord打开提供者com.android.providers.contacts.ContactsProvider2 {6970ad0 3833：com.example.alpesh_pc.contactlist / u0a67}（pid = 3833，uid = 10067）需要android .permission.READ_CONTACTS或android.permission.WRITE_CONTACTS 在android.os.Parcel.readException（Parcel.java:1683）在android.os.Parcel.readException（Parcel.java:1636）在android.app.ActivityManagerProxy.getContentProvider（ActivityManagerNative.java:4169）在android.app.ActivityThread.acquireProvider（ActivityThread.java:5434）在android.app.ContextImpl $ ApplicationContentResolver.acquireUnstableProvider（ContextImpl.java:2267）在android.content.ContentResolver.acquireUnstableProvider（ContentResolver.java:1515）在android.content.ContentResolver.query（ContentResolver.java:514）在android.content.ContentResolver.query（ContentResolver.java:472）在com.example.alpesh_pc.contactlist.MainActivity.onCreate（MainActivity.java:17）在android.app.Activity.performCreate（Activity.java:6662）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1118）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2599）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2707）在android.app.ActivityThread.-wrap12（ActivityThread.java）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1460）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6077） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:865）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:755）申请已终止。

Answer 1

添加权限 Android清单xml中的<uses-permission android:name="android.permission.READ_CONTACTS" />

Answer 2

检查Manifest.xml中的权限，并为api level 23或更高版本添加Runtime权限，如：

for Manifest file：

<uses-permission android:name="android.permission.READ_CONTACTS" />

并且对于运行时权限检查：

permission_tutorial

Answer 3

我认为您使用的是Marshmallow OS（Android版本6）或任何需要运行时权限检查的设备。

你尝试过这个吗？

// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(thisActivity,
            Manifest.permission.READ_CONTACTS)
    != PackageManager.PERMISSION_GRANTED) {

// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
        Manifest.permission.READ_CONTACTS)) {

    // Show an explanation to the user *asynchronously* -- don't block
    // this thread waiting for the user's response! After the user
    // sees the explanation, try again to request the permission.

}else{

    // No explanation needed, we can request the permission.

    ActivityCompat.requestPermissions(thisActivity,
            new String[]{Manifest.permission.READ_CONTACTS},
            MY_PERMISSIONS_REQUEST_READ_CONTACTS);

    // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
    // app-defined int constant. The callback method gets the
    // result of the request.
    }
}

并处理权限请求响应

@Override
public void onRequestPermissionsResult(int requestCode,
       String permissions[], int[] grantResults) {
       switch (requestCode) {
          case MY_PERMISSIONS_REQUEST_READ_CONTACTS: {
           // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
            && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

            // permission was granted, yay! Do the
            // contacts-related task you need to do.

        } else {

            // permission denied, boo! Disable the
            // functionality that depends on this permission.
        }
        return;
    }

    // other 'case' lines to check for other
    // permissions this app might request
    }
}

如果仍然存在任何混淆，您可以查看here。

获取Android运行时：致命异常

3 个答案: