Android实验报告生命周期

1、Android 开发（实验四） 实验题目：Activity生命周期验证试验 指导老师： 班 级：计算机科学与技术系班 姓 名：（一、 实验目的1、深入理解Activity运行机制和原理。2、掌握Activity的声明周期各个阶段工作流程。3、掌握多个Activity之间生命周期的转换过程。4、通络Intent实现多页面之间数据的传递(辅助完成)。二、 实验内容1、 搭建任意组件，设计多个界面，运行程序观察其生命周期的情况。2、 使用Intent实现页面之间数据的传递。三、 实验代码AlifecyfleActivity.javapackage com.wr;import android.app.

2、Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class AlifecycleActivity extends Activity /* Called when the activity is first created. */ Override public void onCreate(Bundle savedI

3、nstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.main); Button BtnStart = (Button) findViewById(R.id.BtnStart); BtnStart.setOnClickListener(new MyBtnClickListener(); Overrideprotected void onDestroy() / TODO Auto-generated method stubsuper.onDestroy();System.out.println(Alif

4、ecycleActivity:onDestroy();Overrideprotected void onPause() / TODO Auto-generated method stubsuper.onPause();System.out.println(AlifecycleActivity:onPause();Overrideprotected void onRestart() / TODO Auto-generated method stubsuper.onRestart();System.out.println(AlifecycleActivity:onRestart();Overrid

5、eprotected void onResume() / TODO Auto-generated method stubsuper.onResume();System.out.println(AlifecycleActivity:onResume();Overrideprotected void onStart() / TODO Auto-generated method stubsuper.onStart();System.out.println(AlifecycleActivity:onStart();Overrideprotected void onStop() / TODO Auto-

6、generated method stubsuper.onStop();System.out.println(AlifecycleActivity:onStop();public class MyBtnClickListener implements OnClickListener /重写点击事件处理方法 public void onClick(View arg0) / TODO Auto-generated method stub Intent intent = new Intent(AlifecycleActivity.this,AlcActivity2.class);/创建意图对象 /使

7、用意图对象打开一个新的Activity startActivity(intent); AlcActivity.javapackage com.wr;import android.app.Activity;import android.os.Bundle;public class AlcActivity2 extends Activity /* Called when the activity is first created. */ Override public void onCreate(Bundle savedInstanceState) super.onCreate(savedInst

8、anceState); setContentView(R.layout.alcactivity2_main); Overrideprotected void onDestroy() / TODO Auto-generated method stubsuper.onDestroy();System.out.println(AlcActivity2:onDestroy();Overrideprotected void onPause() / TODO Auto-generated method stubsuper.onPause();System.out.println(AlcActivity2:

9、onPause();Overrideprotected void onRestart() / TODO Auto-generated method stubsuper.onRestart();System.out.println(AlcActivity2:onRestart();Overrideprotected void onResume() / TODO Auto-generated method stubsuper.onResume();System.out.println(AlcActivity2:onResume();Overrideprotected void onStart()

10、/ TODO Auto-generated method stubsuper.onStart();System.out.println(AlcActivity2:onStart();Overrideprotected void onStop() / TODO Auto-generated method stubsuper.onStop();System.out.println(AlcActivity2:onStop();IntentActivity.javapackage com.gml;import android.app.Activity;import android.content.In

11、tent;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;public class IntentActivity extends Activity private TextView txtShow;private Button btnPage2;private String name;private int age;/* Called when the activity is first created. */ Overri

12、de public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.main); txtShow = (TextView) findViewById(R.id.txtShow); btnPage2 = (Button) findViewById(R.id.btnPage2); btnPage2.setOnClickListener(myListener); name = Mary; age = 27; String s = 姓名：+name+

13、nr+年龄：+age; txtShow.setText(s); Override/接收被调程序传回的数据，必须重载onActiveResult()方法。protected void onActivityResult(int requestCode, int resultCode, Intent data) / TODO Auto-generated method stubsuper.onActivityResult(requestCode, resultCode, data);if(requestCode=ACTIVITY_EDIT)if(resultCode=RESULT_OK)Bundle

14、 bundle = data.getExtras();age = bundle.getInt(AGE);String s= 姓名：+name+nr+年龄：+age; txtShow.setText(s);if(resultCode=RESULT_CANCELED); private static final int ACTIVITY_EDIT = 1;private Button.OnClickListener myListener = new Button.OnClickListener()public void onClick(View v)Intent intent = new Inte

15、nt(); /使用setClass()确定Intent的发件人和收件者，IntentActivity传递给Sent.setClass(IntentActivity.this, OneActivity.class);/使用Bundle对象的put()方法打包数据，并利用putExtras()来进行传递Bundle bundle = new Bundle();bundle.putString(NAME, name);bundle.putInt(AGE, age);intent.putExtras(bundle);/用startActivityForResult()方法取代star

16、tAcctivity()方法将包里寄出，并等待另一方的回音。startActivityForResult(intent,ACTIVITY_EDIT);OneActivity.javapackage com.gml;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.Tex

17、tView;public class OneActivity extends Activity EditText edtAge; int age;public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.page1);TextView txtName = (TextView) findViewById(R.id.txtName);edtAge = (EditText) findViewById(R.id.edtAge);Button bt

18、nSure = (Button) findViewById(R.id.btnSure);Button btnCancel = (Button) findViewById(R.id.btnCancel);btnSure.setOnClickListener(myListener);btnCancel.setOnClickListener(myListener);/使用onCreat方法取出Intent数据，并获取Bundle对象中名称为NAME、AGE的数据Intent intent = this.getIntent();Bundle bundle = intent.getExtras();String name = bundle.getString(NAME);int age = bundle.getInt(AGE);txtName.setT