Question

我有4项活动。

第一个Activity用于输入数据，第二个Activity是TAB主要的Activity（扩展TabActivity）来声明每个标签Activity，第三个和第四个Activity是标签活动。

如何将值从第一个Activity转移到第三个和第四个Activity？

这是我的第一个活动：

public class FirstActivity extends Activity {
  EditText inputName;
  EditText inputAddress;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    //declaration layout
    inputName = (EditText) findViewById(R.id.editText1);
    inputAddress = (EditText) findViewById(R.id.editText2);
    Button btnNextScreen = (Button) findViewById(R.id.button1);

    //Listening to button event
    btnNextScreen.setOnClickListener(new View.OnClickListener() {

      public void onClick(View arg0) {
        //Starting a new Intent
        Intent nextScreen = new Intent(getApplicationContext(), MainTabActivity.class);


        //Sending data to another Activity
        //THIS IS THE VALUE I WANNA TRANSFER TO TAB ACTIVITY
        nextScreen.putExtra("name", inputName.getText().toString());
        nextScreen.putExtra("address", inputEmail.getText().toString());

        // starting new activity
        startActivity(nextScreen);

      }
    });
  }
}

这是我的MainTabActivity：

public class MainTabActivity extends TabActivity {

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.maintabresto);


    Resources res = getResources(); // Resource object to get Drawables
    TabHost tabHost = getTabHost();  // The activity TabHost
    TabHost.TabSpec spec;  // Resusable TabSpec for each tab
    Intent intent;  // Reusable Intent for each tab

    // Create an Intent to launch an Activity for the tab (to be reused)
    intent = new Intent().setClass(this, InfoTab.class);
    // Initialize a TabSpec for each tab and add it to the TabHost
    spec = tabHost.newTabSpec("info").setIndicator("Info",
                      res.getDrawable(R.drawable.iconinfotab))
                  .setContent(intent);
    tabHost.addTab(spec);

    // Do the same for the other tabs
    intent = new Intent().setClass(this, MenuTab.class);
    spec = tabHost.newTabSpec("menu").setIndicator("Menu",
                      res.getDrawable(R.drawable.iconmenutab))
                  .setContent(intent);
    tabHost.addTab(spec);

    tabHost.setCurrentTab(2);
  }
}

这是我的第3次第4次活动（我希望在每次活动中显示我之前转移到textview的值）：

public class InfoTab extends Activity {

  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.infotab);

    TextView txtname = (TextView) findViewById(R.id.textTEST1);
    TextView txtaddress = (TextView) findViewById(R.id.TextTEST2);


    //displaying data from previous activity
    //this is didnt work
    Intent i = getIntent();
    // Receiving the Data
    String name = i.getStringExtra("name");
    String address = i.getStringExtra("address");

    // Displaying Received data
    //this is didnt work
    txtname.setText(name);
    txtaddress.setText(address);
  }
}

谁能帮助我？我试图在第一次活动中这样做：

Intent nextScreen = new Intent(getApplicationContext(), InfoTab.class);

它有效！（该值可以转移到nextactivity，但是在选项卡上打开活动，活动单独打开（不在标签上）......

所以我的目标是将价值转移到他们在MainTabActivity下面打开的每个标签活动。

抱歉，如果我的英语不好。

Answer 1

我认为您的代码中存在一些小错误。但我无法理解。

下面是我的tabActivity代码，其中我正在做同样的事情。

public class MyTabActivity extends TabActivity {
    TabHost myTabHost;
    String data1, data2, data3;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.my_tab_activity);

        Intent i = getIntent();
        data1 = i.getStringExtra("Data1");
        data2 = i.getStringExtra("Data2");
        data3 = i.getStringExtra("Data3");

        setTabs();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.my_tab_activity, menu);
        return true;
    }

    public void setTabs() {
        myTabHost = getTabHost();
        addTab(R.string.tab1Txt, R.drawable.video);
        addTab(R.string.tab2Txt, R.drawable.pdf);
        addTab(R.string.tab3Txt, R.drawable.notepad);
        myTabHost.setCurrentTab(2);
    }

    public void addTab(int labelId, int drawableId) {
        Intent tabIntent = null;
        TabHost.TabSpec spec;
        switch (labelId) {
        case R.string.tab1Txt:
            tabIntent = new Intent(this, Tab1Activity.class);
            tabIntent.putExtra("Data", data1);
            break;
        case R.string.tab2Txt:
            tabIntent = new Intent(this, Tab2Activity.class);
            tabIntent.putExtra("Data", data2);
            break;
        case R.string.tab3Txt:
            tabIntent = new Intent(this, Tab3Activity.class);
            tabIntent.putExtra("Data", data3);
            break;
        }

        spec = myTabHost.newTabSpec("tab" + labelId);
        View tabIndicator = LayoutInflater.from(this).inflate(
                R.layout.indicator, getTabWidget(), false);

        TextView title = (TextView) tabIndicator.findViewById(R.id.title);
        title.setText(labelId);
        title.setTextColor(Color.BLUE);
        ImageView img = (ImageView) tabIndicator.findViewById(R.id.icon);
        img.setImageResource(drawableId);
        spec.setIndicator(tabIndicator);
        spec.setContent(tabIntent);
        myTabHost.addTab(spec);
    }
}

希望它有所帮助。

将值传输到TAB活动

1 个答案: