import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;public class MainActivity extends Activity {private static final String TAG = "logmain";private Button button;private EditText name;private CheckBox soccer;private CheckBox basketball;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);name = (EditText) this.findViewById(R.id.editText);soccer = (CheckBox) this.findViewById(R.id.cbsoccer);basketball = (CheckBox) this.findViewById(R.id.cbbasketball);button = (Button) this.findViewById(R.id.button);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent i = new Intent(MainActivity.this, NextActivity.class);startActivity(i);}});//通过onCreate取值if (savedInstanceState != null) {String s = savedInstanceState.getString("name");boolean cbsoccer = savedInstanceState.getBoolean("soccer");boolean cbbasketball = savedInstanceState.getBoolean("basketball");//测试1/* name.setText("oncreatename");soccer.setChecked(true);basketball.setChecked(false);*///赋值1
            name.setText(s);soccer.setChecked(cbsoccer);basketball.setChecked(cbbasketball);}Log.i(TAG, "---Main onCreate---");}@Overrideprotected void onStart() {super.onStart();Log.i(TAG, "---Main onStart---");}@Overrideprotected void onRestoreInstanceState(Bundle savedInstanceState) {//调用activity的onRestoreInstanceState得到保存的值//如果赋值1注释了 测试1开放  再把 super.onRestoreInstanceState(savedInstanceState)和通过onRestoreInstanceState取值注释//旋转屏幕就是测试1的值super.onRestoreInstanceState(savedInstanceState);//通过onRestoreInstanceState取值/*if (savedInstanceState != null) {String s = savedInstanceState.getString("name");boolean cbsoccer = savedInstanceState.getBoolean("soccer");boolean cbbasketball = savedInstanceState.getBoolean("basketball");//测试2//name.setText("onrestorename");//soccer.setChecked(false);//basketball.setChecked(true);//赋值2name.setText(s);soccer.setChecked(cbsoccer);basketball.setChecked(cbbasketball);}*/Log.i(TAG, "---Main onRestoreInstanceState---");}@Overrideprotected void onResume() {super.onResume();Log.i(TAG, "---Main onResume---");}@Overrideprotected void onPause() {super.onPause();Log.i(TAG, "---Main onPause---");}@Overrideprotected void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);//通过onSaveInstanceState存值outState.putString("name", name.getText().toString().trim());outState.putBoolean("soccer", soccer.isChecked());outState.putBoolean("basketball", basketball.isChecked());Log.i(TAG, "---Main onSaveInstanceState---");}@Overrideprotected void onStop() {super.onStop();Log.i(TAG, "---Main onStop---");}@Overrideprotected void onRestart() {super.onRestart();Log.i(TAG, "---Main onRestart---");}@Overrideprotected void onDestroy() {super.onDestroy();Log.i(TAG, "---Main onDestroy---");}}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context="com.liang.activitydemo.MainActivity"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:textAppearance="?android:attr/textAppearanceMedium"android:text="Name:"android:id="@+id/tvok"android:layout_alignParentTop="true"android:layout_alignParentStart="true" /><EditTextandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:inputType="textPersonName"android:ems="10"android:id="@+id/editText"android:layout_alignParentTop="true"android:layout_toEndOf="@+id/tvok" /><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:textAppearance="?android:attr/textAppearanceMedium"android:text="Hobby:"android:id="@+id/tvhobby"android:layout_below="@+id/editText"android:layout_alignParentStart="true" /><CheckBoxandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="Soccer"android:id="@+id/cbsoccer"android:layout_below="@+id/editText"android:layout_toEndOf="@+id/tvhobby"android:checked="false" /><CheckBoxandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="Basketball"android:id="@+id/cbbasketball"android:layout_below="@+id/editText"android:layout_toEndOf="@+id/cbsoccer"android:checked="false" /><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="Next"android:id="@+id/button"android:layout_below="@+id/cbsoccer"android:layout_alignParentStart="true" /></RelativeLayout>