Android按返回键（后退键）Back键事件捕获的两种方法

package zhangphil.back;import android.support.v7.app.ActionBarActivity;import android.util.Log;import android.view.KeyEvent;import android.os.Bundle;public class MainActivity extends ActionBarActivity {// 打印事件的标签private final String TAG = "Phil";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Log.d(TAG, "onCreate()");}@Overrideprotected void onStart() {super.onStart();Log.d(TAG, "onStart()");}@Overrideprotected void onRestart() {super.onRestart();Log.d(TAG, "onRestart()");}@Overrideprotected void onResume() {super.onResume();Log.d(TAG, "onResume()");}@Overrideprotected void onPause() {super.onPause();Log.d(TAG, "onPause()");}@Overrideprotected void onStop() {super.onStop();Log.d(TAG, "onStop()");}@Overrideprotected void onDestroy() {super.onDestroy();Log.d(TAG, "onDestroy()");}// 捕获返回键的方法1@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {// 按下BACK，同时没有重复Log.d(TAG, "onKeyDown()");}return super.onKeyDown(keyCode, event);}// 捕获返回键的方法2@Overridepublic void onBackPressed() {Log.d(TAG, "onBackPressed()");super.onBackPressed();}}

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