android leakcanary无法使用

出现的问题是

无法显示内存泄漏的问题

代码如下

build.gradle
dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.5'
    releaseImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.5'
    testImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.5'
}

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        if (LeakCanary.isInAnalyzerProcess(this)) {
            // This process is dedicated to LeakCanary for heap analysis.
            // You should not init your app in this process.
            return;
        }
        LeakCanary.install(this);

    }

}

Activity代码

private static Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
        }
    };
           @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_memory_leak);
        // 使用匿名 Handler 发送耗时消息
        Message message = Message.obtain();
        mHandler.sendMessageDelayed(message, 60000);
        }