Question

我有一个mainactivity布局和另一个带textview的布局。我想从mainactivity文件中将值设置为textview并将其显示在mainlayout文件中。我怎么能这样做呢。我正在使用布局充气器并成功获得Textview的引用ID。

主要活动：

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    View vi = inflater.inflate(R.layout.layout2, null); //log.xml is your file.
    TextView tv = (TextView)vi.findViewById(R.id.text1);

    System.out.println("Textview= "+tv);
    tv.setText("hELLLLOO");
}
}

Main_Layout.xml

<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=".MainActivity" >
</RelativeLayout>

Layout2.xml：

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
 >
 <TextView
    android:id="@+id/text1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hello_world"
    android:layout_gravity="center" 
    android:textColor="#000000"/>
 </LinearLayout>

Answer 1

您可以使用intent并将值传递给下一个Activity。您只需对布局进行充气，但不会将其添加到“活动”。

您必须获得RelativeLayout的引用并将膨胀的视图添加到其中

拥有RelativeLAyout的ID

<RelativeLayout android:id="@+id/relativelayout

然后

RelativeLayout rl = (RelativeLayout) findViewById(R.id.relativeLayout);
View vi = inflater.inflate(R.layout.layout2, null); //log.xml is your file.
TextView tv = (TextView)vi.findViewById(R.id.text1);
tv.setText("hELLLLOO");
rl.addView(vi);

您也可以使用

http://www.curious-creature.org/2009/02/25/android-layout-trick-2-include-to-reuse/

或

在MainActivity

Intent intent = new Intent(MainActivity.this,SecondActivity.class);
intent.putExtra("key","hello");
startActivity(intent);

然后在SecondActivity

// Inflate Layout 2 and set text to textview.
String value = getIntent().getStringExtra("key");

Answer 2

在 MainActivity.java

中执行此类操作

View view;
/* We inflate the xml which gives us a view */
view = mInflater.inflate(R.layout.my_list_custom_row, false);

 /* Get the widget with id name which is defined in the xml of the row */
 TextView name = (TextView) view.findViewById(R.id.name);

 /* Populate the row's xml with info from the item */
 name.setText(myObject.getName());

其中mInflater是LayoutInflator的Object。或者查看this链接。希望这有帮助。

如何从另一个布局显示TextView

2 个答案: