Android - FATAL EXCEPTION: main java.lang.RuntimeException: Unable to start activity ComponentInfo

Question

I try to get the phone number of my device, get the following error:

FATAL EXCEPTION:

main

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.dell.myapplication/com.example.dell.myapplication.MainActivity}: java.lang.SecurityException: Requires READ_PHONE_STATE: Neither user 10035 nor current process has android.permission.READ_PHONE_STATE.

I am a new at android development. I have looked at the errors that have been generated by LogCat but do not know the problem and where to find it based on the errors I received.

Thanks for your help and sorry for the duration!

here is my code:

MainActivity.java

package com.example.dell.myapplication;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.util.List;

public class MainActivity extends ActionBarActivity {

    public MainActivity() {
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TelephonyManager tm=(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
        String imei = tm.getDeviceId();
        String phone = tm.getLine1Number();
        Toast.makeText(MainActivity.this, "my IMEI: "+imei, Toast.LENGTH_LONG).show();
        Toast.makeText(MainActivity.this,"my phone: "+phone,Toast.LENGTH_LONG).show();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
//        if (id == R.id.action_settings) {
//            return true;
//        }

        return super.onOptionsItemSelected(item);
    }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <TextView android:text="@string/hello_world" android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textView2" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/textView"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentBottom="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button"
        android:layout_below="@+id/textView2"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="121dp" />

</RelativeLayout>

LogCat

12-23 12:50:35.013    8789-8789/? D/dalvikvm﹕ Late-enabling CheckJNI
12-23 12:50:35.303    8789-8789/com.example.dell.myapplication I/dalvikvm﹕ Could not find method android.view.ViewGroup.onRtlPropertiesChanged, referenced from method android.support.v7.widget.Toolbar.onRtlPropertiesChanged
12-23 12:50:35.303    8789-8789/com.example.dell.myapplication W/dalvikvm﹕ VFY: unable to resolve virtual method 13332: Landroid/view/ViewGroup;.onRtlPropertiesChanged (I)V
12-23 12:50:35.303    8789-8789/com.example.dell.myapplication D/dalvikvm﹕ VFY: replacing opcode 0x6f at 0x0007
12-23 12:50:35.308    8789-8789/com.example.dell.myapplication I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.internal.widget.TintTypedArray.getChangingConfigurations
12-23 12:50:35.308    8789-8789/com.example.dell.myapplication W/dalvikvm﹕ VFY: unable to resolve virtual method 408: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
12-23 12:50:35.308    8789-8789/com.example.dell.myapplication D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
12-23 12:50:35.308    8789-8789/com.example.dell.myapplication I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.internal.widget.TintTypedArray.getType
12-23 12:50:35.308    8789-8789/com.example.dell.myapplication W/dalvikvm﹕ VFY: unable to resolve virtual method 430: Landroid/content/res/TypedArray;.getType (I)I
12-23 12:50:35.308    8789-8789/com.example.dell.myapplication D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
12-23 12:50:35.443    8789-8789/com.example.dell.myapplication D/AndroidRuntime﹕ Shutting down VM
12-23 12:50:35.443    8789-8789/com.example.dell.myapplication W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x416f02a0)
12-23 12:50:35.468    8789-8789/com.example.dell.myapplication E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.dell.myapplication/com.example.dell.myapplication.MainActivity}: java.lang.SecurityException: Requires READ_PHONE_STATE: Neither user 10035 nor current process has android.permission.READ_PHONE_STATE.
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
            at android.app.ActivityThread.access$700(ActivityThread.java:140)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4921)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.SecurityException: Requires READ_PHONE_STATE: Neither user 10035 nor current process has android.permission.READ_PHONE_STATE.
            at android.os.Parcel.readException(Parcel.java:1425)
            at android.os.Parcel.readException(Parcel.java:1379)
            at com.android.internal.telephony.IPhoneSubInfo$Stub$Proxy.getDeviceId(IPhoneSubInfo.java:222)
            at android.telephony.TelephonyManager.getDeviceId(TelephonyManager.java:249)
            at com.example.dell.myapplication.MainActivity.onCreate(MainActivity.java:37)
            at android.app.Activity.performCreate(Activity.java:5206)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
            at android.app.ActivityThread.access$700(ActivityThread.java:140)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4921)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
            at dalvik.system.NativeStart.main(Native Method)
12-23 12:50:35.513    8789-8793/com.example.dell.myapplication D/dalvikvm﹕ GC_CONCURRENT freed 234K, 14% free 9604K/11143K, paused 3ms+3ms, total 49ms
12-23 12:50:48.168    8789-8789/com.example.dell.myapplication I/Process﹕ Sending signal. PID: 8789 SIG: 9

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.dell.myapplication" >

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <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>
    </application>

</manifest>

Answer 1

I have this problem and figure out that you need to add READ_PHONE_NUMBERS if your targetSdkVersion is 31

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

You need to request that permission explicitly also

Answer 2

Add READ_PHONE_STATE permission

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

in your manifest file

READ_PHONE_STATE

Allows read only access to phone state.

Note: If both your minSdkVersion and targetSdkVersion values are set to 3 or lower, the system implicitly grants your app this permission. If you don't need this permission, be sure your targetSdkVersion is 4 or higher.

Protection level: dangerous Constant Value: "android.permission.READ_PHONE_STATE"

Answer 3

in your manifest, you need to add followong permission in order to read phone number:

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

In your logCat, system tells the you the reason of the error with this line:

Caused by: java.lang.SecurityException: Requires READ_PHONE_STATE: Neither user 10035 nor current process has android.permission.READ_PHONE_STATE.

Answer 4

Add Permission READ_PHONE_STATE

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