1.使用synchronized：
public static SpeechApi getInstance() {
if (mInstance == null) {
synchronized (SpeechApi.class) {
if (mInstance == null) {
mInstance = new SpeechApi();
}
}
}
return mInstance;
}
2.使用final类型定义：
public class SingleInstance {
private static final SingleInstance instance = new SingleInstance();
private SingleInstance(){
}
public static SingleInstance getInstance(){
return instance;
}
}
单例在线程并发时的创建
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转载自wudukongjian007-163-com.iteye.com/blog/1654621
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