Android(安卓)Studio实现Activity生命周期的7个方法Log打印日志信息

核心代码

package com.ljq.myproject.activity;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import com.ljq.myproject.R;/** * 1.开始运行demo * The activity state---->onStart * The activity state---->onResume * 2.按下back键 返回 activity从stack中弹出 * The activity state---->onPause * The activity state---->onStop * The activity state---->onDestroy * 3.再次启动demo * The activity state---->onStart * The activity state---->onResume * 4.按下了HOME键 当前TASK 处于后台状态，系统保存状态 * The activity state---->onPause * The activity state---->onStop * 5.再次启动demo 回复原来的TASK activity在栈顶 * The activity state---->onRestart * The activity state---->onStart * The activity state---->onResume */public class DemoActivity extends AppCompatActivity {    private static final String TAG = "20164206004 java 3班 刘继强";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_demo);        Log.d(TAG, "The activity state---->onCreate");    }    protected void onStart() {        super.onStart();        Log.i(TAG, "The activity state---->onStart");    }    protected void onRestart() {        super.onRestart();        Log.i(TAG, "The activity state---->onRestart");    }    protected void onResume() {        super.onResume();        Log.i(TAG, "The activity state---->onResume");    }    protected void onPause() {        super.onPause();        Log.i(TAG, "The activity state---->onPause");    }    protected void onStop() {        super.onStop();        Log.i(TAG, "The activity state---->onStop");    }    protected void onDestroy() {        super.onDestroy();        Log.i(TAG, "The activity state---->onDestroy");    }}

使用Android Studio的LogCat查看日志打印信息

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