本文概述
- Android纵向和横向模式屏幕方向示例
句法:
<
activity android:name="package_name.Your_ActivityName"
android:screenOrientation="orirntation_type">
<
/activity>
例:
<
activity android:name=" example.srcmini.com.screenorientation.MainActivity"
android:screenOrientation="portrait">
<
/activity>
<
activity android:name=".SecondActivity"
android:screenOrientation="landscape">
<
/activity>
screenOrientation属性的常用值如下:
值 | 描述 |
---|---|
unspecified | 它是默认值。在这种情况下, 系统将选择方向。 |
portrait | 高不宽 |
landscape | 宽不高 |
sensor | 方向由设备方向传感器确定。 |
activity_main.xml
<
?xml version="1.0" encoding="utf-8"?>
<
android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="example.srcmini.com.screenorientation.MainActivity"><
Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginTop="112dp"
android:onClick="onClick"
android:text="Launch next activity"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.612"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText1"
app:layout_constraintVertical_bias="0.613" /><
TextView
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="124dp"
android:ems="10"
android:textSize="22dp"
android:text="This activity is portrait orientation"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.502"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<
/android.support.constraint.ConstraintLayout>
活动类
package example.srcmini.com.screenorientation;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {Button button1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1=(Button)findViewById(R.id.button1);
}
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, SecondActivity.class);
startActivity(intent);
}
}
activity_second.xml
<
?xml version="1.0" encoding="utf-8"?>
<
android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="example.srcmini.com.screenorientation.SecondActivity"><
TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="180dp"
android:text="this is landscape orientation"
android:textSize="22dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.502"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<
/android.support.constraint.ConstraintLayout>
SecondActivity类
package example.srcmini.com.screenorientation;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class SecondActivity extends AppCompatActivity {@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
}
}
AndroidManifest.xml【android屏幕定位示例】在AndroidManifest.xml文件中,在活动中添加screenOrientation属性并提供其方向。在此示例中,我们为MainActivity提供“纵向”方向,为SecondActivity提供“横向”方向。
<
?xml version="1.0" encoding="utf-8"?>
<
manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="example.srcmini.com.screenorientation"><
application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<
activity
android:name="example.srcmini.com.screenorientation.MainActivity"
android:screenOrientation="portrait">
<
intent-filter>
<
action android:name="android.intent.action.MAIN" /><
category android:name="android.intent.category.LAUNCHER" />
<
/intent-filter>
<
/activity>
<
activity android:name=".SecondActivity"
android:screenOrientation="landscape">
<
/activity>
<
/application><
/manifest>
输出:
文章图片
文章图片
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