Android中实现振动效果 (How to Imeplement Vibration Effect In Andoid)

实现振动效果，需要调用Android系统提供的Vibrator，Vibrator主要的API有：

Ÿ   vibrate(long milliseconds)振动指定的时间。

Ÿ   vibrate(long[] pattern, int repeat)按照给定的模式振动。

Patterns指定振动模式，数组的每个整数是一个时间间隔，第一个整数指定等待多长时间开始振动，后面的参数依次重复指定振动持续的时间和振动间隔的时间。

Repeat指定patter数组中的一个索引值，从这个值开始不断重复振动模式，如果为-1则不重复振动。

Ÿ   cancel()取消振动。

下面是不同振动效果的例子（来自参考资料[2]）,这些代码需要在一个Context（如Activity, Service）中进行调用。注意默认情况下当屏幕暗掉时，振动也会停止，可以通过设置屏幕常亮来使振动持续。

1.1     振动指定的时间

Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);

// Vibrate for 200 milliseconds

v.vibrate(300);

1.2     按照指定的模式进行振动

按照”S-O-S”求救信号模式进行振动：

Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);

// This example will cause the phone to vibrate "SOS" in Morse Code

// In Morse Code, "s" = "dot-dot-dot", "o" = "dash-dash-dash"

// There are pauses to separate dots/dashes, letters, and words

// The following numbers represent millisecond lengths

int dot = 200;      // Length of a Morse Code "dot" in milliseconds

int dash = 500;     // Length of a Morse Code "dash" in milliseconds

int short_gap = 200;    // Length of Gap Between dots/dashes

int medium_gap = 500;   // Length of Gap Between Letters

int long_gap = 1000;    // Length of Gap Between Words

long[] pattern = {

    0,  // Start immediately

    dot, short_gap, dot, short_gap, dot,    // s

    medium_gap,

    dash, short_gap, dash, short_gap, dash, // o

    medium_gap,

    dot, short_gap, dot, short_gap, dot,    // s

    long_gap

};

// Only perform this pattern one time (-1 means "do not repeat")

v.vibrate(pattern, -1);

1.3     重复振动直到用户取消

Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);

// Start immediately

// Vibrate for 200 milliseconds

// Sleep for 500 milliseconds

long[] pattern = { 0, 200, 500 };

// The "0" means to repeat the pattern starting at the beginning

// CUIDADO: If you start at the wrong index (e.g., 1) then your pattern will be off --

// You will vibrate for your pause times and pause for your vibrate times !

v.vibrate(pattern, 0);

In another part of your code, you can handle turning off the vibrator as shown below:

view source

print?

// Stop the Vibrator in the middle of whatever it is doing

// CUIDADO: Do *not* do this immediately after calling .vibrate().

// Otherwise, it may not have time to even begin vibrating!

v.cancel();

1.4     参考

[1] [Vibrator. http://developer.android.com/reference/android/os/Vibrator.html#vibrate(long[], int)

[2] Vibration Examples for Android Phone Development.

http://android.konreu.com/developer-how-to/vibration-examples-for-android-phone-development/