Section Introduction:
In this section, what we introduce is theVibrator(Vibrator), which is the phone's built-in vibrator. Don't go directly to Baidu and search for vibrators, because your search results may be the mysterious prop shown in the figure, or other mysterious props:
Well, back to the Vibrator introduced in this section, it is actually a service provided by Android for the device to vibrate! For example, in the earlier Notification we can set vibration. When a push message is received, we can set a vibration reminder. It is essential for games, such as the "Fighting Planes" game. When your plane is blown up by someone, it will vibrate for a long time!
Now let's write a simple example to get familiar with the usage of the Vibrator!
Official API documentation:Vibrator
1. Obtain the Vibrator instance:
Vibrator vb = (Vibrator)getSystemService(Service.VIBRATOR_SERVICE);
2. Related available methods:
- abstract void cancel(): Turn off or stop the vibrator
- abstract boolean hasVibrator(): Determine whether the hardware has a vibrator
- void vibrate(long milliseconds): Control the phone to vibrate for the length of time specified by `milliseconds`
- void vibrate(long[] pattern, int repeat): Specify the phone to vibrate according to the mode specified by pattern! For example: if pattern is new int[200,400,600,800], it means letting the vibrator alternately start and stop at the time intervals 200, 400, 600, 800! The second parameter is the repeat count; if it is -1, it vibrates only once; if it is 0, it keeps vibrating. There are also two other methods that are not commonly used. By the way, using the vibrator also requires adding the following permission in AndroidManifest.xml: <uses-permission android:name="android.permission.VIBRATE"/>
3. Example usage: Setting a vibrator with different frequencies:
For Vibrator, the most widely used application is the so-called phone massager apps. Searching in the app market, there are a lot. The author casually downloaded a few to look at, and they are all much the same. This little thing actually has over 80,000 downloads... Well, it doesn't seem like a lot. But the common feature is to switch the vibration frequency to complete the massage, and whether the so-called massage effect is really effective is unknown. Next, let's implement a simple massager! The core is actually: the array parameter in vibrate(); you just need to write an array according to your own needs! The following code needs to be tested on a real device!
Running effect screenshot：
Implementation code：
Simple layout file with five buttons:activity_main.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/btn_hasVibrator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="判断是否有振动器" />
<Button
android:id="@+id/btn_short"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="短振动" />
<Button
android:id="@+id/btn_long"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="长振动" />
<Button
android:id="@+id/btn_rhythm"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="节奏振动" />
<Button
android:id="@+id/btn_cancle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="取消振动" />
</LinearLayout>
Next is theMainActivity.javapart:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button btn_hasVibrator;
private Button btn_short;
private Button btn_long;
private Button btn_rhythm;
private Button btn_cancle;
private Vibrator myVibrator;
private Context mContext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获得系统的Vibrator实例:
myVibrator = (Vibrator) getSystemService(Service.VIBRATOR_SERVICE);
mContext = MainActivity.this;
bindViews();
}
private void bindViews() {
btn_hasVibrator = (Button) findViewById(R.id.btn_hasVibrator);
btn_short = (Button) findViewById(R.id.btn_short);
btn_long = (Button) findViewById(R.id.btn_long);
btn_rhythm = (Button) findViewById(R.id.btn_rhythm);
btn_cancle = (Button) findViewById(R.id.btn_cancle);
btn_hasVibrator.setOnClickListener(this);
btn_short.setOnClickListener(this);
btn_long.setOnClickListener(this);
btn_rhythm.setOnClickListener(this);
btn_cancle.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_hasVibrator:
Toast.makeText(mContext, myVibrator.hasVibrator() ? "当前设备有振动器" : "当前设备无振动器",
Toast.LENGTH_SHORT).show();
break;
case R.id.btn_short:
myVibrator.cancel();
myVibrator.vibrate(new long[]{100, 200, 100, 200}, 0);
Toast.makeText(mContext, "短振动", Toast.LENGTH_SHORT).show();
break;
case R.id.btn_long:
myVibrator.cancel();
myVibrator.vibrate(new long[]{100, 100, 100, 1000}, 0);
Toast.makeText(mContext, "长振动", Toast.LENGTH_SHORT).show();
break;
case R.id.btn_rhythm:
myVibrator.cancel();
myVibrator.vibrate(new long[]{500, 100, 500, 100, 500, 100}, 0);
Toast.makeText(mContext, "节奏振动", Toast.LENGTH_SHORT).show();
break;
case R.id.btn_cancle:
myVibrator.cancel();
Toast.makeText(mContext, "取消振动", Toast.LENGTH_SHORT).show();
}
}
}
By the way, don't miss the vibrator permission!
<uses-permission android:name="android.permission.VIBRATE"/>
4. Example code download:
VibratorDemo.zip
Section summary:
Okay, in this section we learned the basic usage of the Vibrator. The code is very simple. Why not add it to your APP right away and make your application HI~. Well, that's all for now. Thank you. It's getting late, the little pig should hurry home! After all, I am still an innocent young lad! It would be bad if I got wet~
