从数据Activity传递至Activity2这样的做发可以恢复User输入数据,当然也可以采用Bundle方式再传递一次也可以但是这样感觉很别扭。
效果:
直接看代码
main.xml
<?xml version="1.0" encoding="utf-8"?><AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><EditTextandroid:id="@+id/heigths"android:layout_width="129px"android:layout_height="wrap_content"android:textSize="18sp"android:layout_x="122px"android:layout_y="141px"></EditText><RadioGroup android:id="@+id/sexs" android:layout_width="wrap_content" android:layout_x="122px" android:orientation="horizontal" android:layout_y="87px" android:layout_height="wrap_content"><RadioButtonandroid:id="@+id/boy"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="男"></RadioButton><RadioButtonandroid:id="@+id/gril"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="女"></RadioButton></RadioGroup><TextViewandroid:id="@+id/sexText"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="性别:"android:layout_x="51px"android:layout_y="102px"></TextView><TextViewandroid:id="@+id/heigth"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="身高:"android:layout_x="51px"android:layout_y="152px"></TextView><Buttonandroid:id="@+id/count"android:layout_width="74px"android:layout_height="wrap_content"android:text="计算"android:layout_x="140px"android:layout_y="203px"></Button></AbsoluteLayout>
layout2.xml
<?xml version="1.0" encoding="utf-8"?><AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextViewandroid:id="@+id/text"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="性别:"android:layout_x="74px"android:layout_y="106px"></TextView><Buttonandroid:id="@+id/back"android:layout_width="74px"android:layout_height="wrap_content"android:text="@string/back"android:layout_x="140px"android:layout_y="203px"></Button></AbsoluteLayout>
strings.xml
<?xml version="1.0" encoding="utf-8"?><resources> <string name="hello">Hello World, BackTransferData!</string> <string name="back">返回</string> <string name="app_name">BackTransferData</string></resources>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="back.transfer.data" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".BackTransferData" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".BackTransferData2"></activity> </application></manifest>
R.java
/* AUTO-GENERATED FILE. DO NOT MODIFY. * * This class was automatically generated by the * aapt tool from the resource data it found. It * should not be modified by hand. */package back.transfer.data;public final class R { public static final class attr { } public static final class drawable { public static final int icon=0x7f020000; } public static final class id { public static final int back=0x7f050001; public static final int boy=0x7f050004; public static final int count=0x7f050008; public static final int gril=0x7f050005; public static final int heigth=0x7f050007; public static final int heigths=0x7f050002; public static final int sexText=0x7f050006; public static final int sexs=0x7f050003; public static final int text=0x7f050000; } public static final class layout { public static final int layout2=0x7f030000; public static final int main=0x7f030001; } public static final class string { public static final int app_name=0x7f040002; public static final int back=0x7f040001; public static final int hello=0x7f040000; }}BackTransferData.java
package back.transfer.data;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.RadioButton;public class BackTransferData extends Activity { /** Called when the activity is first created. */ private Button bt; EditText et; private RadioButton rb; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); /**载入main.xml*/ setContentView(R.layout.main); /**找到文本框*/ et=(EditText)findViewById(R.id.heigths); /**找到计算按钮*/ bt=(Button)findViewById(R.id.count); /**设置按钮的监听事件*/ bt.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v){ /**判断是否被选中*/ String sex="女"; rb=(RadioButton)findViewById(R.id.boy); if(rb.isChecked()){ sex="男"; } /**把取得的字符串转换成double类型*/ double height=Double.parseDouble((et.getText()).toString()); /**实例化Bundle对像,把将要传递的数据以键值对的形式添加进去*/ Bundle bundle=new Bundle(); /**添加的是Double类型的数值*/ bundle.putDouble("height", height); /**添加的是String类型的数值*/ bundle.putString("sex", sex); /**实例化Intent对像,并指定传递的class*/ Intent intent=new Intent(); intent.setClass(BackTransferData.this, BackTransferData2.class); /**将设置好值的Bundle对象添加进Intent*/ intent.putExtras(bundle); /**调用TransferData2 其中startActivityForResult(intent, 0)的0代表下一个要传递Activity要返回的数据可以自定义*/ startActivityForResult(intent, 0); } }); } /**覆盖onActivityResult方法*/ @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { /**取得Bundle对象*/ Bundle bundle=data.getExtras(); /**取得对应sex键的值*/ String sex=bundle.getString("sex"); /**取得对应height键的值*/ double height=bundle.getDouble("height"); /**设置哪个RadioButton按钮被选中*/ RadioButton rb2=(RadioButton)findViewById(R.id.gril); et.setText(""+height); if(sex.equals("男")){ rb.setChecked(true); }else{ rb2.setChecked(true); } } }BackTransferData2.java
package back.transfer.data;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;public class BackTransferData2 extends Activity { /** Called when the activity is first created. */ private Button bt; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); /**载入layout2.xml*/ setContentView(R.layout.layout2); /**找到TextView*/ TextView text=(TextView)findViewById(R.id.text); /**获取Bundle*/ Bundle bundle=this.getIntent().getExtras(); /**对TextView设值*/ text.setText("性别:"+bundle.getString("sex")+"\n身高:"+bundle.getDouble("height")); /**找到Button*/ bt=(Button)findViewById(R.id.back); /**设置bt按钮的监听事件*/ bt.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v){ /**返回results回上一个activity*/ BackTransferData2.this.setResult(RESULT_OK,BackTransferData2.this.getIntent()); /**结束当前activity*/ BackTransferData2.this.finish(); } }); }}