How to make android phone silent in java
<p>Hi I am new to android development. I am trying to make my android phone silent using java. After searching google I found some examples but they didnt workd for me. Here is my code.</p>

<pre><code>package com.zafar.silent;

import android.app.Activity;
import android.content.Context;
import android.media.AudioManager;
import android.os.Bundle;

public class Silent extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    AudioManager audiomanage = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
    audiomanage.setRingerMode(AudioManager.RINGER_MODE_SILENT);
}
}
</code></pre>

<p>Can someone help me how can I make this run?</p>

<p>Thanks in advance</p>

<p><strong>Update</strong></p>

<p>Here is my menifest file</p>

<pre><code>&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.zafar.silent"
android:versionCode="1"
android:versionName="1.0" &gt;

&lt;uses-sdk android:minSdkVersion="10" /&gt;

&lt;application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" &gt;
    &lt;activity
        android:name=".Silent"
        android:label="@string/app_name" &gt;
        &lt;intent-filter&gt;
            &lt;action android:name="android.intent.action.MAIN" /&gt;

            &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
        &lt;/intent-filter&gt;
    &lt;/activity&gt;
    &lt;uses-permission android:name="android.permission.WRITE_SETTINGS"/&gt;
    &lt;uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS"/&gt;
&lt;/application&gt;

&lt;/manifest&gt;
</code></pre>

<p><strong>I updated menifest file</strong></p>
