内存泄露的例子分析

1、（MemorygcrootsGCDalvikVMGCjavaheapDalvikVMHeapGrowthLimit（MemorygcrootsGCDalvikVMGCjavaheapDalvikVMHeapGrowthLimitheapDalvikVMHeapGrowthLimit一静态变量引起的内存泄。1. Context public class IMManager privateContextcontext;privateic IMManager public sicIMManagergetInstance(Contextcontext) if (mInstance = null) 被。

2、被。public class IMManager privateContextcontext;privateic IMManager public sicIMManagergetInstance(Contextcontext) if (mInstance = null) synchronized(IMManager.class) if (mInstance = null)/将传入的context换成Applicationcontext mInstance = newreturn privateIMManager(Contextcontext) this.context = context;sy

3、nchronized(IMManager.class) if (mInstance = null)mInstance=newreturn privateIMManager(Contextcontext) this.context = context;二非静类引起的内存泄。二非静类引起的内存泄。2.public class LeakAty extendivity protected void onCreate(Bundle savedInstane) public void test()类实例LeakAty.this,所以会导致内存漏newThread(newRunnable() publicv

4、oidrun() while (true) try catch (erruptedExceptione) 类void scheduleTimer() newTimer().schedule(new类void scheduleTimer() newTimer().schedule(newTimerTask() publicvoidrun() while (true) ;,Long.MAX_VALUEpublic class LeakAty extendivity protected void onCreate(Bundle savedInstane) /加上ic，变成静public sic vo

5、id test() newThread(newRunnable()publicvoidrun() while (true) try catch (erruptedExceptione) Handler publicclassLeakAtyextend ivity protectedvoid onCreate(Bundlee) private Handler mHandler = new Handler() publicvoidhandleMessage(android.os.Messageswitch(msg.whatHandler publicclassLeakAtyextend ivity

6、 protectedvoid onCreate(Bundlee) private Handler mHandler = new Handler() publicvoidhandleMessage(android.os.Messageswitch(msg.what) case 0:/ 刷新数privatevoid fetchData()/获取数mHandler比如尤其是ostDelayed(sRunnable,1000* 60*View ttButton = findViewById(R.id.tt_button); ttButton.setOnClickListener(newView.OnC

7、lickListener()publicvoidonClick(Viewv) public class LeakAty extendivitypublic class LeakAty extendivity private TextView tvResult;private MyHandlerprotected void onCreate(Bundle savedInstane) tvResult=(TextView)findViewById(R.id.tvResult); handler = new MyHandler(this);/第一步，将Handler改成静类privateicclas

8、s MyHandlerextends Handler/第二步，将需Activity的地方，改成private WeakReferencepublic MyHandler(LeakAtyaty)this.atyInstance =new publicvoidhandleMessage(Messagemsg) LeakAtyaty=atyInstance=null?null:/如果Activity回收了，则不处理这些消if(aty=null|aty.isFinishing() aty.tvResult.setText(fetchdataprivatevoid fetchData()/ 获取数pro

9、tectedvoid onDestroy()/第三步，在Activity退出的时候移除回里面的哥们Activity 都Handler 还想继续玩什么？用非静态里面的哥们Activity 都Handler 还想继续玩什么？用非静态三资源未关闭引起的内存泄四不要用未移void registerListener() SensorManagersensorManager=(SensorManager) Sensor sensor = sensorManager.getDefaulsensorManager.registerListener(this, sensor,View smButton = findViewById(R.id.sm_button); smButton.setOnClickListener(newView.OnClickListener()1. 调 用 , 而 没 有 调 系统中(如信号强度等)LockScreen eListener 系统中(如信号强度等)LockScreen eListener 的时候就会创建一个LockScreen对象而当锁屏界的时候LockScreen对象就掉。 但是如果 L