android 开发之Activity切换
16lz
2021-12-04
main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /><Button android:id="@+id/btnNextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="下一个Activity"/><Button android:id="@+id/btn_exit" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="关闭"/></LinearLayout>
second_activity.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /><Button android:id="@+id/btn_back" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="上一个activity"/><Button android:id="@+id/btn_close" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="关闭"/></LinearLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.esri.arcgis.sample" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="7" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".ActivityChange" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="ActivitySecond" /> </application></manifest>
ActivityChange.java
package com.esri.arcgis.sample;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class ActivityChange extends Activity { private Button btn; private Button btnClose; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btn=(Button)findViewById(R.id.btnNextView); btn.setOnClickListener(new OnClickListener() { public void onClick(View v) { Intent itent=new Intent(); itent.setClass(ActivityChange.this, ActivitySecond.class); startActivity(itent); ActivityChange.this.finish(); } }); btnClose=(Button)findViewById(R.id.btn_exit); btnClose.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { finish(); } }); }}
ActivitySecond.java
package com.esri.arcgis.sample;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;public class ActivitySecond extends Activity { private Button btn2; private Button btnClose; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.second_activity); btn2 = (Button) findViewById(R.id.btn_back); btn2.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent intent = new Intent(); intent.setClass(ActivitySecond.this, ActivityChange.class); startActivity(intent); //如果不关闭当前的会出现好多个页面 ActivitySecond.this.finish(); } }); btnClose = (Button) findViewById(R.id.btn_close); btnClose.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { finish(); } }); }}
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