Method for Realizing Vibration and Jitter Effect of Mobile Phone by Android

Realization of Vibration and Jitter Effect of Android Mobile Phone

(1) The layout file is as follows

<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:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".MainActivity" >
  <EditText
    android:id="@+id/et_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:layout_marginTop="16dp"
    android:ems="10" >
    <requestFocus />
  </EditText>
  <Button
    android:id="@+id/btn_submit"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/et_text"
    android:layout_below="@+id/et_text"
    android:layout_marginTop="38dp"
    android:text=" Submit " />
</RelativeLayout>

(2) MainActivity. java

package com.example.test11;
import android.app.Activity;
import android.os.Bundle;
import android.os.Vibrator;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
  private EditText et_text;
  private Button btn_submit;
  /**
   *  Mobile phone vibrator 
   */
  private Vibrator vibrator;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    et_text = (EditText) this.findViewById(R.id.et_text);
    btn_submit = (Button) this.findViewById(R.id.btn_submit);
    //  System service of vibration effect 
    vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
    btn_submit.setOnClickListener(new OnClickListener() {
      String text = et_text.getText().toString().trim();
      public void onClick(View v) {
        if (TextUtils.isEmpty(text)) {
          Toast.makeText(MainActivity.this, " Content is empty ", 0).show();
          Animation shake = AnimationUtils.loadAnimation(
              MainActivity.this, R.anim.shake);
          et_text.startAnimation(shake);
          /*
           *  The way of vibration 
           */
          // vibrator.vibrate(2000);// Vibrate for two seconds 
          //  Below is the vibration that can make the vibration regular   -1 Indicates no duplication  0 Cyclic vibration 
          long[] pattern = { 200, 2000, 2000, 200, 200, 200 };
          vibrator.vibrate(pattern, -1);
        }
      }
    });
  }
}

(3) The two animation files used are as follows:

cycle_7.xml

<?xml version="1.0" encoding="utf-8"?>
<cycleInterpolator xmlns:android="http://schemas.android.com/apk/res/android"
  android:cycles="7" />

shake.xml

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
  android:duration="1000"
  android:fromXDelta="0"
  android:interpolator="@anim/cycle_7"
  android:toXDelta="10" />

(4) Permissions to be used:

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

This effect can only be achieved on a real machine, not shown above.

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