在不同的活動中在EditText和Text View之間傳輸數據

我是android應用程序開發的新手。我在這裏有一個問題。在第一項活動中，我創建了10行。每行包含一個鏈接到第二個活動的下一個按鈕。在第二個活動，我有edittext字段輸入用戶的詳細信息，如帳戶名稱，密碼等。每次我更新我的帳戶名稱，當我按下android後退按鈕，該行應包含更新的名稱。但我無法將帳戶名稱傳遞給第一項活動。在不同的活動中在EditText和Text View之間傳輸數據

下面是我的第一個活動代碼：

public class AccountSetup extends Activity { 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.account_main); 
     this.initViews(); 
    } 

    private void initViews(){ 
     TextView user1 = (TextView)findViewById(R.id.user1); 
     Button iconNext1 = (Button)findViewById(R.id.iconNext1); 
     iconNext1.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent1 = new Intent(AccountSetup.this, AccountSettingActivity1.class); 
       Intent1.putExtra("rowid","1"); 
       startActivityForResult(Intent1, 100); 
      } 
     }); 

     Button iconNext2 = (Button)findViewById(R.id.iconNext2);  
     iconNext2.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent2 = new Intent(AccountSetup.this, AccountSettingActivity2.class); 
       startActivity(Intent2); 
       finish(); 
      } 
     }); 

     Button iconNext3 = (Button)findViewById(R.id.iconNext3);  
     iconNext3.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent3 = new Intent(AccountSetup.this, AccountSettingActivity3.class); 
       //onNewIntent((Intent) v.getTag()); 
       Intent3.putExtra("rowid","3"); 
       startActivity(Intent3); 
       finish(); 
      } 
     }); 

     Button iconNext4 = (Button)findViewById(R.id.iconNext4);  
     iconNext4.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent4 = new Intent(AccountSetup.this, AccountSettingActivity4.class); 
       //onNewIntent((Intent) v.getTag()); 
       Intent4.putExtra("rowid","4"); 
       startActivity(Intent4); 
       finish(); 
      } 
     }); 

     Button iconNext5 = (Button)findViewById(R.id.iconNext5);  
     iconNext5.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent5 = new Intent(AccountSetup.this, AccountSettingActivity5.class); 
       //onNewIntent((Intent) v.getTag()); 
       Intent5.putExtra("rowid","5"); 
       startActivity(Intent5); 
       finish(); 
      } 
     }); 
     Button iconNext6 = (Button)findViewById(R.id.iconNext6);  
     iconNext6.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent6 = new Intent(AccountSetup.this, AccountSettingActivity6.class); 
       //onNewIntent((Intent) v.getTag()); 
       Intent6.putExtra("rowid","6"); 
       startActivity(Intent6); 
       finish(); 
      } 
     }); 
     Button iconNext7 = (Button)findViewById(R.id.iconNext7);  
     iconNext7.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent7 = new Intent(AccountSetup.this, AccountSettingActivity7.class); 
       //onNewIntent((Intent) v.getTag()); 
       Intent7.putExtra("rowid","7"); 
       startActivity(Intent7); 
       finish(); 
      } 
     }); 

     Button iconNext8 = (Button)findViewById(R.id.iconNext8);  
     iconNext8.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent8 = new Intent(AccountSetup.this, AccountSettingActivity8.class); 
       //onNewIntent((Intent) v.getTag()); 
       Intent8.putExtra("rowid","8"); 
       startActivity(Intent8); 
       finish(); 
      } 
     }); 
     Button iconNext9 = (Button)findViewById(R.id.iconNext9);  
     iconNext9.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent9 = new Intent(AccountSetup.this, AccountSettingActivity9.class); 
       //onNewIntent((Intent) v.getTag()); 
       Intent9.putExtra("rowid","9"); 
       startActivity(Intent9); 
       finish(); 
      } 
     }); 
     Button iconNext10 = (Button)findViewById(R.id.iconNext10);  
     iconNext10.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       Intent Intent10 = new Intent(AccountSetup.this, AccountSettingActivity10.class); 
       //onNewIntent((Intent) v.getTag()); 
       Intent10.putExtra("rowid","10"); 
       startActivity(Intent10); 
       finish(); 
      } 
     }); 
    } 

    @Override 
    public void onBackPressed() { 
     Intent i = new Intent(AccountSetup.this, WelcomeActivity.class); 
     startActivity(i); 
     finish(); 
     super.onBackPressed(); 
    } 

    @Override 
    protected void onActivityResult(int requestCode,int resultCode, Intent data) { 
     if (requestCode == 100) { 
      if (resultCode == RESULT_OK) {  
       String accountName1 = data.getStringExtra("accountName1");   
      } 
     } 
    } 
}

而下面是第二個活動的代碼。

public class AccountSettingActivity1 extends Activity{ 

    private EditText etAccountName; 
    private EditText etWanIp; 
    private EditText etLocalIp; 
    private EditText etPort; 
    private EditText etPassword; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.account_tab_content_setting); 
     this.initViews(); 

    } 
     private void initViews(){ 
      etAccountName = (EditText)this.findViewById(R.id.etAccountName); 
      etWanIp = (EditText)this.findViewById(R.id.etWanIp); 
      etLocalIp = (EditText)this.findViewById(R.id.etLocalIp); 
      etPort = (EditText)this.findViewById(R.id.etPort); 
      etPassword = (EditText)this.findViewById(R.id.etPassword); 

      // Assigns value 
      SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this); 
      etAccountName.setText(sp.getString("accountName1", "")); 
      etWanIp.setText(sp.getString("wanIp1", "")); 
      etLocalIp.setText(sp.getString("localIp1", "")); 
      etPort.setText(sp.getString("port1", "")); 
      etPassword.setText(sp.getString("password1", "")); 

      etWanIp.setOnFocusChangeListener(new OnFocusChangeListener(){ 
       @Override 
       public void onFocusChange(View arg0, boolean hasFocus) { 
        if(!hasFocus){ 
         System.out.println("lost focus"); 
         AccountSettingActivity1.this.saveSettings(); 
        } 
       } 
      }); 
     } 

     private void saveSettings(){ 
      String accountName1 = etAccountName.getText().toString(); 
      String wanIp1 = etWanIp.getText().toString(); 
      String localIp1 = etLocalIp.getText().toString(); 
      String port1 = etPort.getText().toString(); 
      String password1 = etPassword.getText().toString(); 

      accountName1 = (accountName1.trim().length() == 0)? "User": accountName1; 
      wanIp1 = (wanIp1.trim().length() == 0)? "0.0.0.0": wanIp1; 
      localIp1 = (localIp1.trim().length() == 0)? "0.0.0.0": localIp1; 
      port1 = (port1.trim().length() == 0)? "8000": port1; 
      password1 = (password1.trim().length() == 0)? "xxxx": password1; 

      etAccountName.setText(accountName1); 
      etWanIp.setText(wanIp1); 
      etLocalIp.setText(localIp1); 
      etPort.setText(port1); 
      etPassword.setText(password1); 

      SharedPreferences.Editor editor = PreferenceManager 
        .getDefaultSharedPreferences(this).edit(); 
      editor.putString("accountName1", etAccountName.getText().toString()); 
      editor.putString("wanIp1", etWanIp.getText().toString()); 
      editor.putString("localIp1", etLocalIp.getText().toString()); 
      editor.putString("port1", etPort.getText().toString()); 
      editor.putString("password1", etPassword.getText().toString()); 
      editor.commit(); 
     } 

/* @Override 
    public void onBackPressed() { 
     saveSettings(); 
     Intent i = new Intent(AccountSettingActivity1.this, AccountSetup.class); 
     startActivity(i); 
     finish(); 
     super.onBackPressed(); 
    }*/ 

     public void onBackPressed() { 

      saveSettings(); 
      //final EditText Eclass1; 

      EditText et = (EditText)findViewById(R.id.etAccountName); 
      String s= et.getText().toString(); 
      Intent i = new Intent(AccountSettingActivity1.this, AccountSetup.class); 
      i.putExtra("accountName1" ,s); 
      setResult(RESULT_OK, i);  
      finish(); 
      super.onBackPressed(); 
     } 

    @Override 
    protected void onPause() { 
     // When user leaves this tab, saves the values 
     this.saveSettings(); 
     super.onPause(); 
    } 
}

1日活動的XML代碼：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:AccountSetup="http://schemas.android.com/apk/res/com.example.play" 
    android:id="@+id/linearLayout1" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" > 

<!--  Account Toolbar --> 
    <RelativeLayout 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:background="#324F85" > 
     <Button 
      android:layout_width="54dp" 
      android:layout_height="30dp" 
      android:layout_alignParentLeft="true" 
      android:background="@drawable/ic_btn_done" 
      android:layout_centerVertical="true"/> 
     <TextView 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:text="@string/selectAccount" 
      android:textAppearance="?android:attr/textAppearanceMedium" 
      android:textSize="15dp" 
      android:layout_centerHorizontal="true" 
      android:layout_centerVertical="true" 
      android:gravity="center" 
      android:textStyle="bold" /> 
     <Button 
      android:id="@+id/btnAdd" 
      android:layout_width="54dp" 
      android:layout_height="30dp" 
      android:layout_alignParentRight="true" 
      android:background="@drawable/ic_btn_add_account" 
      android:layout_centerVertical="true" /> 

     <ImageView 
      android:layout_width="4dp" 
      android:layout_height="30dp" 
      android:layout_alignTop="@+id/btnDone" 
      android:layout_toRightOf="@+id/btnDone" 
      android:src="@drawable/toolbar_seperator" /> 

     <ImageView 
      android:layout_width="4dp" 
      android:layout_height="30dp" 
      android:layout_alignTop="@+id/btnAdd" 
      android:layout_toLeftOf="@+id/btnAdd" 
      android:src="@drawable/toolbar_seperator" /> 
    </RelativeLayout> 

     <RelativeLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:paddingLeft="15dp" 
     android:paddingRight="15dp" 
     android:background="@drawable/logo_small_white" > 

     <ScrollView 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" > 

      <TableLayout 
       android:id="@+id/tlStatus" 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:stretchColumns="1" > 

       <TableRow 
        style="@style/tableRow" 
        android:id="@+id/row1" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         android:id="@+id/user1" 
         style="@style/textSettingLabel" 
         android:layout_weight="1" /> 
        <Button 
         android:id="@+id/iconNext1" 
         android:layout_width="match_parent" 
         android:layout_height="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:background="@drawable/icon_next" /> 
       </TableRow> 

       <View style="@style/tableRowBorder" /> 

       <TableRow 
        style="@style/tableRow" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         android:id="@+id/user2" 
         style="@style/textSettingLabel" 
         android:layout_weight="1" /> 
        <Button 
         android:id="@+id/iconNext2" 
         android:layout_width="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:scaleType="fitEnd" 
         android:background="@drawable/icon_next" /> 
       </TableRow> 

       <View style="@style/tableRowBorder" /> 

       <TableRow 
        style="@style/tableRow" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         android:id="@+id/user3" 
         style="@style/textSettingLabel" 
         android:layout_weight="1" /> 
        <Button 
         android:id="@+id/iconNext3" 
         android:layout_width="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:scaleType="fitEnd" 
         android:background="@drawable/icon_next" /> 
       </TableRow> 

       <View style="@style/tableRowBorder" /> 

       <TableRow 
        style="@style/tableRow" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         android:id="@+id/user4" 
         style="@style/textSettingLabel" 
         android:layout_weight="1" /> 
        <Button 
         android:id="@+id/iconNext4" 
         android:layout_width="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:scaleType="fitEnd" 
         android:background="@drawable/icon_next" /> 
       </TableRow> 

       <View style="@style/tableRowBorder" /> 

       <TableRow 
        style="@style/tableRow" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         style="@style/textSettingLabel" 
         android:id="@+id/user5" 
         android:layout_alignBaseline="@+id/etZone_1_1" 
         android:text="User 1" /> 
        <Button 
         android:id="@+id/iconNext5" 
         android:layout_width="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:scaleType="fitEnd" 
         android:background="@drawable/icon_next" /> 
       </TableRow> 

       <View style="@style/tableRowBorder" /> 

       <TableRow 
        style="@style/tableRow" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         style="@style/textSettingLabel" 
         android:id="@+id/user6" 
         android:layout_alignBaseline="@+id/etZone_1_1" 
         android:text="User 1" /> 
        <Button 
         android:id="@+id/iconNext6" 
         android:layout_width="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:scaleType="fitEnd" 
         android:background="@drawable/icon_next" /> 
       </TableRow> 

       <View style="@style/tableRowBorder" /> 

       <TableRow 
        style="@style/tableRow" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         style="@style/textSettingLabel" 
         android:id="@+id/user7" 
         android:layout_alignBaseline="@+id/etZone_1_1" 
         android:text="User 1" /> 
        <Button 
         android:id="@+id/iconNext7" 
         android:layout_width="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:scaleType="fitEnd" 
         android:background="@drawable/icon_next" /> 
       </TableRow> 

       <View style="@style/tableRowBorder" /> 

       <TableRow 
        style="@style/tableRow" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         style="@style/textSettingLabel" 
         android:id="@+id/user8" 
         android:layout_alignBaseline="@+id/etZone_1_1" 
         android:text="User 1" /> 
        <Button 
         android:id="@+id/iconNext8" 
         android:layout_width="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:scaleType="fitEnd" 
         android:background="@drawable/icon_next" /> 
       </TableRow> 

       <View style="@style/tableRowBorder" /> 

       <TableRow 
        style="@style/tableRow" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         style="@style/textSettingLabel" 
         android:id="@+id/user9" 
         android:layout_alignBaseline="@+id/etZone_1_1" 
         android:text="User 1" /> 
        <Button 
         android:id="@+id/iconNext9" 
         android:layout_width="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:scaleType="fitEnd" 
         android:background="@drawable/icon_next" /> 
       </TableRow> 

       <View style="@style/tableRowBorder" /> 

       <TableRow 
        style="@style/tableRow" 
        android:layout_width="wrap_content" 
        android:layout_height="50dp" 
        android:layout_weight="1" 
        android:gravity="center_vertical" > 

        <TextView 
         style="@style/textSettingLabel" 
         android:id="@+id/user10" 
         android:layout_alignBaseline="@+id/etZone_1_1" 
         android:text="User 1" /> 
        <Button 
         android:id="@+id/iconNext10" 
         android:layout_width="wrap_content" 
         android:layout_gravity="right" 
         android:layout_weight="1" 
         android:scaleType="fitEnd" 
         android:background="@drawable/icon_next" /> 
       </TableRow>    
       <View style="@style/tableRowBorder" />    
      </TableLayout> 
     </ScrollView> 
    </RelativeLayout> 
</LinearLayout>

第二屆活動的XML代碼：

<?xml version="1.0" encoding="UTF-8"?> 
<LinearLayout 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     xmlns:ToolBar="http://schemas.android.com/apk/res/com.example.play" 
     xmlns:TextViewMyRiadPro="http://schemas.android.com/apk/res/com.example.play" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:orientation="vertical"> 

     <ViewSwitcher 
      android:id="@+id/switcher" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" > 

      <ScrollView 
       android:id="@+id/settingsView" 
       android:layout_width="fill_parent" 
       android:layout_height="fill_parent" 
       android:background="@drawable/logo_small_white" > 

       <RelativeLayout 
        android:layout_width="fill_parent" 
        android:layout_height="565dp" 
        android:padding="15dp" > 

        <TextView 
         android:id="@+id/tvAccount" 
         android:text="Name" 
         android:layout_alignBaseline="@+id/etAccountName" 
         style="@style/textSettingLabel" /> 

        <EditText 
         android:id="@+id/etAccountName" 
         style="@style/textSettingEdit" 
         android:layout_alignLeft="@+id/etWanIp" 
         android:inputType="text" /> 

        <TextView 
         android:id="@+id/tvAccount" 
         android:layout_below="@+id/etAccountName" 
         android:text="User Account Name" 
         style="@style/textSettingHint" /> 

        <TextView 
         android:id="@+id/tvWan" 
         android:text="Wan IP" 
         android:layout_alignBaseline="@+id/etWanIp" 
         style="@style/textSettingLabel" /> 
        <EditText 
         android:id="@+id/etWanIp" 
         android:layout_below="@+id/tvAccount" 
         android:layout_toRightOf="@+id/tvWan" 
         style="@style/textSettingEdit" android:inputType="text"/> 
        <TextView 
         android:id="@+id/tvWanHint" 
         android:layout_below="@+id/etWanIp" 
         android:text="Port forwarding is required in order to establish connection from the internet" 
         style="@style/textSettingHint" />  

        <TextView 
         android:id="@+id/tvLocal" 
         android:text="Local IP" 
         android:layout_alignBaseline="@+id/etLocalIp" 
         style="@style/textSettingLabel" /> 
        <EditText 
         android:id="@+id/etLocalIp" 
         android:layout_below="@+id/tvWanHint" 
         android:layout_toRightOf="@+id/tvLocal" 
         style="@style/textSettingEdit" android:inputType="text"/> 
        <TextView 
         android:id="@+id/tvLocalHint" 
         android:layout_below="@+id/etLocalIp" 
         android:text="The IP address of the alarm system in the local area network. 192.168.1.234 is the default address." 
         style="@style/textSettingHint" /> 

        <TextView 
         android:id="@+id/tvPort" 
         android:text="Port" 
         android:layout_alignBaseline="@+id/etPort" 
         style="@style/textSettingLabel" /> 
        <EditText 
         android:id="@+id/etPort" 
         android:layout_below="@+id/tvLocalHint" 
         android:layout_toRightOf="@+id/tvPort" 
         android:inputType="number" 
         style="@style/textSettingEdit" /> 
        <TextView 
         android:id="@+id/tvPortHint" 
         android:layout_below="@+id/etPort" 
         android:text="The connection port of the alarm system. 8000 is the default port." 
         style="@style/textSettingHint" /> 

        <TextView 
         android:id="@+id/tvPassword" 
         android:text="Password" 
         android:layout_alignBaseline="@+id/etPassword" 
         style="@style/textSettingLabel" /> 
        <EditText 
         android:id="@+id/etPassword" 
         android:layout_below="@+id/tvPortHint" 
         android:layout_toRightOf="@+id/tvPassword" 
         style="@style/textSettingEdit" android:inputType="textPassword"/> 
        <TextView 
         android:layout_below="@+id/etPassword" 
         android:id="@+id/tvPasswordHint" 
         android:text="Your 4 digits password to access the alarm system." 
         style="@style/textSettingHint" /> 
       </RelativeLayout> 
      </ScrollView>   
     </ViewSwitcher> 
</LinearLayout>

來源

2013-05-10 Angela

使用startActivityForResult（）來啓動你的第二個活動

startActivityForResult(intent, requestcode)

當第二活動是fini棚做到以下幾點，意圖可以認爲你需要，傳回值活性1

setResult(RESULT_OK, intent) 
finish();

現在活動1，覆蓋onActivityResult（）

onActivityResult() 
{ 
    //update your textview here. 
}

來源

2013-05-10 06:10:17 deepdroid

對不起，我在這裏noob，不能設法趕上你的概念。你介意編輯後分享我的代碼嗎？ – Angela 2013-05-10 06:19:40

這應該有助於你，開始活動的結果。 http://developer.android.com/reference/android/app/Activity.html#StartingActivities – deepdroid 2013-05-10 06:39:34

真誠感謝我！!!你的線索解決了我的問題！ – Angela 2013-05-10 09:38:21

deepdroid的回答是真實的，但你有一個其他替代品

設置public static String value=null;因此，它不會取決於整個活動。

來源

2013-05-10 06:16:40

在不同的活動中在EditText和Text View之間傳輸數據

回答

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