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1、引入依赖

 dependencies {
   debugCompile 'com.squareup.leakcanary:leakcanary-android:1.5.2'
   releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.5.2'
 }

2.application中初始化

public static RefWatcher getRefWatcher(Context context) {
    MyApplication application = (MyApplication) context.getApplicationContext();
    return application.refWatcher;
}

private RefWatcher refWatcher;

oncreate方法中

private void initlLeakcanary() {
    if (LeakCanary.isInAnalyzerProcess(this)) {
        // This process is dedicated to LeakCanary for heap analysis.
        // You should not init your app in this process.
        return;
    }
    refWatcher=   LeakCanary.install(this);
}

3、在activity和fragment的onDestroy

//内存泄露监控
RefWatcher refWatcher = MyApplication.getRefWatcher(mContext);
refWatcher.watch(this);

如上是handler的内存泄露