两个LinearLayouts在同一位置

时间:2015-02-24 15:32:13

标签: android

我想在同一位置添加两个线性布局,其宽度与父级相同。当我按下Button1时,应该出现linearLayout1,并且应该出现Button2 LinearLayout2。如何在android中执行此操作?

4 个答案:

答案 0 :(得分:1)

试试这个: 首先创建your_xml_file.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

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

    </LinearLayout>

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

    </LinearLayout>

    <Button

        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/button1"
        android:focusable="false"
        android:layout_centerInParent="true"
        android:background="@drawable/ic_launcher"
        android:layout_centerHorizontal="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/button2"
        android:focusable="false"
        android:background="@drawable/ic_launcher"
        android:layout_below="@id/button1"
        android:layout_centerHorizontal="true" />


</RelativeLayout>

和java类......

public class YourActivity extends Activity {

    private Button button1,button2;
    private LinearLayout linearLayout1,linearLayout2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.yourXml);

        button1 = (Button).findViewById(android.R.id.button1);
        button2 = (Button).findViewById(android.R.id.button2);
        linearLayout1 = (LinearLayout).findViewById(android.R.id.firstLinear);
        linearLayout2 = (LinearLayout).findViewById(android.R.id.secondLinear);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                linearLayout1.setVisibility(View.VISIBLE);
                linearLayout2.setVisibility(View.GONE);
            }
        });

        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                linearLayout2.setVisibility(View.VISIBLE);
                linearLayout1.setVisibility(View.GONE);
            }
        });


    }

希望这会对你有所帮助。快乐编码:)

答案 1 :(得分:0)

您可以在代码中使用setVisibility()方法,如:

view.setVisibility(View.GONE);
view.setVisibility(View.VISIBLE);

答案 2 :(得分:0)

如果您没有使用Fragment执行任务,则只需使用setVisibility(View.VISIBLE)setVisibility(View.INVISIBLE) / setVisibility(View.GONE)(如果其他UI元素不依赖于查看您'将设置GONE)

onClick个按钮上。它看起来像这样:

btn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            linearLayout1.setVisibility(View.VISIBLE);
            linearLayout2.setVisibility(View.INVISIBLE);
        }
    });

btn2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            linearLayout1.setVisibility(View.VISIBLE);
            linearLayout2.setVisibility(View.INVISIBLE);
        }
    });

答案 3 :(得分:0)

  

您可以在单个活动中组合多个片段并重复使用   片段也在多个活动中。您可以将片段视为一个片段   活动的模块化部分,具有自己的生命周期,接收   它自己的输入事件,你可以添加或删除   活动正在运行。

以下是如何使用Fragment完成的:

首先创建一个包含2个按钮和一个Framelayout的布局文件,稍后我们将编写代码,将framelayout替换为片段中的内容。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:paddingLeft="@dimen/activity_horizontal_margin"
                android:paddingRight="@dimen/activity_horizontal_margin"
                android:paddingTop="@dimen/activity_vertical_margin"
                android:paddingBottom="@dimen/activity_vertical_margin">

    <LinearLayout
        android:layout_width="match_parent"
        android:id="@+id/ll1"
        android:layout_height="wrap_content">

        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Button 1"
            android:id="@+id/bt1"/>

        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Button 2"
            android:id="@+id/bt2"
            android:layout_alignBottom="@+id/frame"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true"/>
    </LinearLayout>

    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/ll1"
        android:id="@+id/frame"/>
</RelativeLayout>

接下来创建2个片段,例如FragmentA和fragmentB

public class fragmentA extends Fragment{
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.l1, container, false); //create a layout here
        // add some code to set some text for eg
        return v;
    }
}

创建第二个片段B

public class fragmentB extends Fragment{
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.l1, container, false); //create a layout here
        // add some code to set some text for eg
        return v;
    }
}

现在添加带有2个按钮的Activity代码,当单击按钮1调用fragmentManager.beginTransaction().replace(R.id.frame, new fragmentA()).commit();时,这将使用fragmentA的内容替换framelayout,类似于单击按钮2时调用fragmentManager.beginTransaction().replace(R.id.frame, new fragmentB()).commit(); < / p>

完整代码:

public class MyFragment extends ActionBarActivity implements View.OnClickListener {
Button bt1,bt2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_tt);
        bt1=(Button)findViewById(R.id.bt1);
        bt2=(Button)findViewById(R.id.bt2);
        bt1.setOnClickListener(this);
        bt2.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        FragmentManager fragmentManager = getSupportFragmentManager();
        switch (v.getId()) {
            case R.id.bt1:
                fragmentManager.beginTransaction()
                        .replace(R.id.frame, new BlockCallers()).commit();
                break;
            case R.id.bt2:
                fragmentManager.beginTransaction()
                        .replace(R.id.frame, new smsSetting()).commit();
        }

    }
}

有关教程,请参阅此link(官方link