Android LinearLayout使用

来源：互联网发布：大数据新闻报道编辑：程序博客网时间：2024/06/10 23:31

本例通过几个Button 来展示及操作LinearLayout的使用方法，LinearLayout线性布局排列方式有“水平”和“垂直”，最大的特点是设定好排列方式后所包含的组件会自动安照指定排列方式排列，而不用对子组件设置座标参数，简单易用适合多个组件以水平或垂直方式排列的情况。

//LinearLayoutActivity.java

package shortcut.song.com.myapplication;import android.graphics.Color;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.Gravity;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.view.WindowManager;import android.widget.LinearLayout;import android.widget.Button;public class LinearLayoutActivity extends AppCompatActivity {    LinearLayout mLinearLayout;    Button mButtonH;    Button mButtonV;    Button mButtonLeft;    Button mButtonRight;    Button mButtonTop;    Button mButtonBottom;    Button mButtonCenter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_linear_layout);        mLinearLayout = (LinearLayout)findViewById(R.id.activity_linear_layout);        mButtonH = (Button)findViewById(R.id.btn_horzontal);        mButtonV = (Button)findViewById(R.id.btn_vertical);        mButtonLeft = (Button)findViewById(R.id.linear_left);        mButtonRight = (Button)findViewById(R.id.linear_right);        mButtonTop = (Button)findViewById(R.id.linear_top);        mButtonBottom = (Button)findViewById(R.id.linear_bottom);        mButtonCenter = (Button)findViewById(R.id.linear_center);        mButtonH.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                mLinearLayout.setOrientation(LinearLayout.HORIZONTAL);//水平            }        });        mButtonV.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                mLinearLayout.setOrientation(LinearLayout.VERTICAL);//垂直            }        });        mButtonLeft.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                mLinearLayout.setGravity(Gravity.LEFT);//靠左            }        });        mButtonRight.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                mLinearLayout.setGravity(Gravity.RIGHT);//靠右            }        });        mButtonTop.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                mLinearLayout.setGravity(Gravity.TOP);//顶部            }        });        mButtonBottom.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                mLinearLayout.setGravity(Gravity.BOTTOM);//底部            }        });        mButtonCenter.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                mLinearLayout.setGravity(Gravity.CENTER);//居中            }        });    }}

//Layout布局文件activity_linear_layout.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_linear_layout"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal"    tools:context="shortcut.song.com.myapplication.LinearLayoutActivity">            <Button                android:id="@+id/btn_horzontal"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Horzontal"                />            <Button                android:id="@+id/btn_vertical"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Vertical"                />            <Button                android:id="@+id/linear_left"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Left"                />            <Button                android:id="@+id/linear_right"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Right"                />            <Button                android:id="@+id/linear_top"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Top"                />            <Button                android:id="@+id/linear_bottom"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Bottom"                />            <Button                android:id="@+id/linear_center"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Center"             /></LinearLayout>

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