Android中實作振動效果 (How to Imeplement Vibration Effect In Andoid)

實作振動效果，需要調用Android系統提供的Vibrator，Vibrator主要的API有：

Ÿ   vibrate(long milliseconds)振動指定的時間。

Ÿ   vibrate(long[] pattern, int repeat)按照給定的模式振動。

Patterns指定振動模式，數組的每個整數是一個時間間隔，第一個整數指定等待多長時間開始振動，後面的參數依次重複指定振動持續的時間和振動間隔的時間。

Repeat指定patter數組中的一個索引值，從這個值開始不斷重複振動模式，如果為-1則不重複振動。

Ÿ   cancel()取消振動。

下面是不同振動效果的例子（來自參考資料[2]）,這些代碼需要在一個Context（如Activity, Service）中進行調用。注意預設情況下當螢幕暗掉時，振動也會停止，可以通過設定螢幕常亮來使振動持續。

1.1     振動指定的時間

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

// Vibrate for 200 milliseconds

v.vibrate(300);

1.2     按照指定的模式進行振動

按照”S-O-S”求救信号模式進行振動：

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     重複振動直到使用者取消

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     參考

[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/