Android 中 Handler 内存泄露解决办法实例

痛定思痛。 2022-08-18 00:40 161阅读 0赞

对于Handler内存泄露产生的原因这里就不说了，我就直接贴代码弱引用的解决办法。

#### 1.提取了一个公共的内 BaseHandleReference ####

import android.os.Handler;
    import android.os.Looper;
    import android.os.Message;
    
    import java.lang.ref.WeakReference;
    
    public abstract class BaseHandleReference<T> extends Handler {
    
        private WeakReference<T> mReference = null;
    
        public BaseHandleReference(T reference) {
            this.mReference = new WeakReference<T>(reference);
        }
    
        public BaseHandleReference(Callback callback, T reference) {
            super(callback);
            this.mReference = new WeakReference<T>(reference);
        }
    
        public BaseHandleReference(Looper looper, T reference) {
            super(looper);
            this.mReference = new WeakReference<T>(reference);
        }
    
        public BaseHandleReference(Looper looper, Callback callback, T reference) {
            super(looper, callback);
            this.mReference = new WeakReference<T>(reference);
        }
    
        @Override
        public void handleMessage(Message msg) {
            final T reference = mReference.get();
            if (reference != null) {
                referenceHandleMessage(reference, msg);
            }
        }
    
        public abstract void referenceHandleMessage(T reference, Message msg);
    }

#### 2.使用方法 dealWithMessage里面做我们的逻辑处理就好了。 ####

public class TestActivity extends Activity { 
    
        private Handler mHandler;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            mHandler = new TestHandle(this);
        }
    
        private void dealWithMessage(Message msg) {
        }
    
        static class TestHandle extends BaseHandleReference<TestActivity> { 
    
            public TestHandle(TestActivity reference) {
                super(reference);
            }
    
            @Override
            public void referenceHandleMessage(TestActivity reference, Message msg) {
                reference.dealWithMessage(msg);
            }
        }
    
    }