android activity 的finish和ondestroy的区别

简单的说就是在finish()中的super调用了ondestory()的都函数；

MainActivity.java文件：

public class MainActivity extends Activity {private String TAG = "MainActivity";@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button button = (Button) findViewById(R.id.button);button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent(MainActivity.this,TestActivity.class);startActivity(intent);}});}@Overridepublic void finish() {// TODO Auto-generated method stubLog.i(TAG, "finish...1");super.finish();Log.i(TAG, "finish...2");}@Overrideprotected void onDestroy() {// TODO Auto-generated method stubLog.i(TAG, "onDestroy...1");super.onDestroy();Log.i(TAG, "onDestroy...2");}}

TestActivity.java文件：

public class TestActivity extends Activity{private String TAG = "TestActivity";@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);TextView view = new TextView(this);view.setText("hehehhehh");setContentView(view);finish();}@Overridepublic void finish() {// TODO Auto-generated method stubLog.i(TAG, "finish...1");//请在这里做放开测试//super.finish();Log.i(TAG, "finish...2");}@Overrideprotected void onDestroy() {// TODO Auto-generated method stubLog.i(TAG, "onDestroy...1");super.onDestroy();Log.i(TAG, "onDestroy...2");}}

acvitivy_main.xml文件：

放开TestActivity.java中的super.finish();

打印：03-11 11:58:32.127: I/TestActivity(4399): finish...1

03-11 11:58:32.147: I/TestActivity(4399): finish...2

03-11 11:58:32.267: I/TestActivity(4399): onDestroy...1

03-11 11:58:32.267: I/TestActivity(4399): onDestroy...2

注释掉TestActivity.java中的super.finish();

打印：

03-11 11:58:32.127: I/TestActivity(4399): finish...1

03-11 11:58:32.147: I/TestActivity(4399): finish...2

结论如下：finish()中的super调用了ondestory()的都函数；

另外：System.exit(0)
这玩意是退出整个应用程序的，是针对整个Application的。将整个进程直接KO掉。

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