Android(安卓)Activity 切屏处理
16lz
2022-03-12
1. XML Layouts
首先在目录 “res/layout/” 下创建两个XML layout文件 :
2. Activities
创建两个activity类
MainActivity.java –> activity_main.xml
OtherActivity.java –> activity_other.xml
3. AndroidManifest.xml
首先在目录 “res/layout/” 下创建两个XML layout文件 :
res/layout/activity_main.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" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" android:id="@+id/text_view"/></RelativeLayout>res/layout/activity_other.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:layout_width="match_parent" android:layout_height="match_parent" android:text="@string/second_page"/></LinearLayout>
2. Activities
创建两个activity类
MainActivity.java –> activity_main.xml
OtherActivity.java –> activity_other.xml
切换关键代码Intent intent = new Intent(MainActivity.this, OtherActivity.class);startActivity(intent);
MainActivity.javapackage com.lance.changescreen;import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.view.Menu;import android.view.View;import android.widget.TextView;public class MainActivity extends Activity {private TextView mTextView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mTextView = (TextView)findViewById(R.id.text_view);addTextViewListener();}/** * 点击mTextView, 切换到另外一个屏幕 */private void addTextViewListener() {mTextView.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {Intent intent = new Intent(MainActivity.this, OtherActivity.class);startActivity(intent);}});}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}OtherActivity.javapackage com.lance.changescreen;import android.app.Activity;import android.os.Bundle;public class OtherActivity extends Activity {protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_other);}}
3. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.lance.changescreen" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="18" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.lance.changescreen.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <!-- add OtherActivity--> <activity android:label="@string/app_name" android:name="com.lance.changescreen.OtherActivity"/> </application></manifest>
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