内存泄漏的检测;leakCanary

来源：互联网发布：网络电视看珠江台了编辑：程序博客网时间：2024/05/22 12:47

一.导入依赖

debugCompile 'com.squareup.leakcanary:leakcanary-android:1.3'

二.新建一个类继承application并在清单文件中注册.初始化观察

public class MyApplication extends Application {    private static final String TAG = "MyApplication";    private RefWatcher ref;    //创建一个静态方法,用于返回RefWatcher对象    public static RefWatcher getRefWatcher(Context context) {                MyApplication myapplication= (MyApplication) context.getApplicationContext();        return myapplication.ref;    }    @Override    public void onCreate() {        super.onCreate();        //创建RefWatcher实例        ref= LeakCanary.install(this);    }}

三定义一个基类,在基类中监听,这样所有子类都可以监听到了

public class BaseFragment extends Fragment {    private static final String TAG = "BaseFragment";    @Override    public void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        //拿到检测对象        RefWatcher refWatcher = MyApplication.getRefWatcher(getContext());        //进行检测        refWatcher.watch(this);    }}

四.新建一个实例,造成内存泄漏的情况

public class AppFragment extends BaseFragment {    private static final String TAG = "HomeFragment";    private static Demo demo;    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        TextView textView=new TextView(getContext());        textView.setText("sdfs");        demo=new Demo();        return textView;    }    class Demo{    }}

五.执行

public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    public void go(View view) {        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();        transaction.replace(R.id.container,new AppFragment())                .commit();    }}<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.administrator.leakcanarydemo.MainActivity">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="go"/>    <FrameLayout        android:id="@+id/container"        android:layout_width="match_parent"        android:layout_height="match_parent"></FrameLayout></LinearLayout>

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