StrictModeActivity.java

package com.example.hello.activity;

import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.os.SystemClock;
import android.widget.Button;

import com.example.hello.R;
import com.example.hello.base.BaseActivity;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

import static android.os.Build.VERSION.SDK_INT;
import static android.os.Build.VERSION_CODES.GINGERBREAD;

public class StrictModeActivity extends BaseActivity {

    public static final boolean IS_DEBUG = false;
    @BindView(R.id.async_task)
    Button mAsyncTask;

    /**
     * 参考：http://droidyue.com/blog/2015/09/26/android-tuning-tool-strictmode/
     */

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_strict_mode);
        ButterKnife.bind(this);

        enabledStrictMode();
    }

    private void enabledStrictMode() {
        if (IS_DEBUG && SDK_INT >= GINGERBREAD) {
            StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder() //
                    .detectAll() //
                    .penaltyLog() //
                    .penaltyDeath() //
                    .build());

            StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
                    .detectAll()
                    .penaltyLog()
                    .build());
        }
    }

    @OnClick(R.id.async_task)
    public void onClick() {
        startAsyncTask();
    }

    private void startAsyncTask() {
        // This async task is an anonymous class and therefore has a hidden reference to the outer
        // class MainActivity. If the activity gets destroyed before the task finishes (e.g. rotation),
        // the activity instance will leak.
        new AsyncTask<Void, Void, Void>() {
            @Override protected Void doInBackground(Void... params) {
                // Do some slow work in background
                SystemClock.sleep(20000);
                return null;
            }
        }.execute();
    }
}