一个简单的例子让你彻底了解android 中Activity的生命周期

package com.test.testlife;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.util.Log;public class TestActivity extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        Log.v("--", "create");        Intent intent=new Intent(this,Test2.class);        startActivity(intent);    }@Overrideprotected void onDestroy() {Log.v("--", "destroy");super.onDestroy();}@Overrideprotected void onPause() {Log.v("--", "pause");super.onPause();}@Overrideprotected void onResume() {Log.v("--", "resume");super.onResume();}@Overrideprotected void onStart() {Log.v("--", "start");super.onStart();}@Overrideprotected void onStop() {Log.v("--", "stop");super.onStop();}}

package com.test.testlife;import android.app.Activity;import android.os.Bundle;public class Test2 extends Activity{public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);}}

输出结果

可知，即使跳转是在onCreate中进行的，但是onStart,onResume同样会执行，跳转到其他activity会调用onPause和onStop。
按返回键结束当前activity

如果直接在onCreate方法中调用finish（），则调用完onCreate后直接调用onDestroy,其它方法都没有被调用

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