activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/rl" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="16dp" tools:context=".MainActivity" android:background="#c1cfb7" > <TextView android:id="@+id/tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="25dp" android:textColor="#000" android:padding="15dp" /> <Button android:id="@+id/btn_on" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Vibrate" android:layout_below="@id/tv" /> <Button android:id="@+id/btn_repeat" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Repeat Vibration" android:layout_toRightOf="@id/btn_on" android:layout_below="@id/tv" /> <Button android:id="@+id/btn_off" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Off" android:layout_below="@id/tv" android:layout_toRightOf="@id/btn_repeat" /> </RelativeLayout> MainActivity.java
package com.cfsuman.me.androidcode; import android.content.Context; import android.content.res.Resources; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.RelativeLayout; import android.widget.TextView; import android.os.Vibrator; public class MainActivity extends AppCompatActivity { private Context mContext; private Resources mResources; private RelativeLayout mRelativeLayout; private TextView mTextView; private Button mButtonOn; private Button mButtonRepeat; private Button mButtonOff; private Vibrator mVibrator; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Get the application context mContext = getApplicationContext(); // Get the Resources mResources = getResources(); // Get the widgets reference from XML layout mRelativeLayout = (RelativeLayout) findViewById(R.id.rl); mTextView = (TextView) findViewById(R.id.tv); mButtonOn = (Button) findViewById(R.id.btn_on); mButtonRepeat = (Button) findViewById(R.id.btn_repeat); mButtonOff = (Button) findViewById(R.id.btn_off); /* public abstract Object getSystemService (String name) Return the handle to a system-level service by name. The class of the returned object varies by the requested name. */ /* public static simpulan String VIBRATOR_SERVICE Use with getSystemService(Class) to retrieve a Vibrator for interacting with the vibration hardware. */ // Initialize a new instance of system Vibrator mVibrator = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE); // Check whether device hardware has a Vibrator if(mVibrator.hasVibrator()){ mTextView.setText("Device has a Vibrator."); } // Set a click listener for Vibrate button mButtonOn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { /* public void vibrate (long milliseconds) Vibrate constantly for the specified period of time. This method requires the caller to hold the permission VIBRATE. Parameters milliseconds : The number of milliseconds to vibrate. */ // Vibrate the device for a specified time mVibrator.vibrate(5000); // 5 seconds } }); // Set a click listener for repeat button mButtonRepeat.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { /* public void vibrate (long[] pattern, int repeat) Vibrate with a given pattern. Pass in an array of ints that are the durations for which to turn on or off the vibrator in milliseconds. The first value indicates the number of milliseconds to wait before turning the vibrator on. The next value indicates the number of milliseconds for which to keep the vibrator on before turning it off. Subsequent values alternate between durations in milliseconds to turn the vibrator off or to turn the vibrator on. To cause the pattern to repeat, pass the index into the pattern array at which to start the repeat, or -1 to disable repeating. This method requires the caller to hold the permission VIBRATE. Parameters pattern : an array of longs of times for which to turn the vibrator on or off. repeat : the index into pattern at which to repeat, or -1 if you don't want to repeat. */ // Vibrate the device repeatedly. // Set a pattern for vibration long pattern[] = {50,100,100,250,150,350}; // Vibrate the device using a pattern and repeat 3 times mVibrator.vibrate(pattern,3); } }); // Set a click listener for vibration off button mButtonOff.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { /* public abstract void cancel () Turn the vibrator off. This method requires the caller to hold the permission VIBRATE. */ // Cancel the vibration mVibrator.cancel(); } }); } } AndroidManifest.xml [permission]
<uses-permission android:name="android.permission.VIBRATE"/> 
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