以编程方式向布局添加多个自定义视图

时间:2014-11-25 13:46:28

标签: android xml android-layout android-custom-view

例如,如果我有这样的空布局:

layout1.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

</LinearLayout>

还有其他一些布局:

layout2.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView 1" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button 2" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button 3" 
        android:layout_weight="1"/>

</LinearLayout>

我想以编程方式将layout2.xml添加到layout1.xml。我需要有多个不同的版本layout2.xml,我会在需要时添加它。每个文本在TextView和Buttons上都有不同的文本。

如果是普通的Android视图,我通常会使用addView

这样做
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    TextView tv1 = new TextView(this);
    tv1.setText("HELLO");
    my_linear_layout.addView(tv1);

    Button btn2 = new Button(this);
    bt2.setText("WORLD");
    my_linear_layout.addView(btn2);
}

如果我没有像TextView或Button这样简单的东西,并且我有自己的xml定义的View,我怎么能这样做呢?

是否可以以某种方式将所有视图放在适配器中,就像ListView一样,然后在需要时获取它并在这些视图上调用addView

3 个答案:

答案 0 :(得分:41)

您可以给layout2.xml文件充气,编辑文本,然后将其添加到第一个布局:

public class MyActivity extends Activity {

    private ViewGroup mLinearLayout; 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout1);
        mLinearLayout = (ViewGroup) findViewById(R.id.linear_layout);
        addLayout("This is text 1", "This is first button", "This is second Button");
    }

    private void addLayout(String textViewText, String buttonText1, String buttonText2) {
        View layout2 = LayoutInflater.from(this).inflate(R.layout.layout2, mLinearLayout, false);

        TextView textView = (TextView) layout2.findViewById(R.id.button1);
        Button button1 = (Button) layout2.findViewById(R.id.button2); 
        Button button2 = (Button) layout2.findViewById(R.id.button3);

        textView1.setText(textViewText);
        button1.setText(buttonText1);
        button2.setText(buttonText2);

        mLinearLayout.addView(layout2);
    }
}

您可能希望将layout2.xml根视图的android:layout_height更改为wrap_content

答案 1 :(得分:12)

layout1包含ScrollView作为父布局,主要LinearLayout作为子项,如果没有行项目更多屏幕大小ScrollView句柄溢出项目带滚动:

layout1.xml

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:id="@+id/my_linear_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

    </LinearLayout>
</ScrollView>

使用LayoutInflater在父级LinearLayout中添加行项目:

private LinearLayout my_linear_layout;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.layout1);
    my_linear_layout = (LinearLayout) findViewById(R.id.my_linear_layout);

    for(int i=1;i<=5;i++){
        View view = LayoutInflater.from(this).inflate(R.layout.layout2,null);
        TextView button1 = (TextView) view.findViewById(R.id.button1);
        Button button2 = (Button) view.findViewById(R.id.button2);
        TextView button3 = (TextView) view.findViewById(R.id.button3);

        button1.setText("HELLO " + i);
        button2.setText("HELLO "+i);
        button3.setText("HELLO "+i);
        my_linear_layout.addView(view);
    }
}

答案 2 :(得分:4)

尝试这种方法

将id添加到linearlayout layout1.xml

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/firstlayout"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

    </LinearLayout>

在oncreate中

    LinearLayout firstlayout=(LinearLayout)findviewbyId(R.id.firstlayout);

    LinearLayout secondlayoout=(LinearLayout)this.getLayoutInflater().inflate(R.layout.layout2,null); //inflating view from xml 
    TextView btn1=(TextView)secondlayoout.findviewbyId(R.id.button1);
    btn1.settext("TEST");

firstlayout.addview(secondlayoout);