最近在做一个程序,刚开始没考虑全,就用TabHost做了,后来才发现程序中,需要在一个TabHost内实现多个Activity的跳转,网上搜了一翻,有人建议把TabHost改成Button,然后每个Activity中都处理加入的Button,这样是可以解决问题,但是修改起来很繁琐,所以还是继续寻找替代方法。在网上搜到了《使用ActivityGroup来切换Activity和Layout》一文,但是用在我的程序中还需要有大的改动,所以索性我就自己写了个测试例子,不错,成功了,拿出来和大家分享一下,希望对大家有帮助!
下面图片是测试程序的效果图
两个选项卡的实现
布局文件 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">
- <TabHost xmlns:android="http://schemas.android.com/apk/res/android"
- android:id="@android:id/tabhost" android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- <LinearLayout android:orientation="vertical"
- android:layout_width="fill_parent" android:layout_height="fill_parent">
- <TabWidget android:id="@android:id/tabs"
- android:layout_width="fill_parent" android:layout_height="wrap_content" />
- <FrameLayout android:id="@android:id/tabcontent"
- android:layout_width="fill_parent" android:layout_height="wrap_content"
- android:layout_weight="3">
- </FrameLayout>
- </LinearLayout>
- </TabHost>
- </LinearLayout>
<?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"> <TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="3"> </FrameLayout> </LinearLayout> </TabHost> </LinearLayout>
Java代码实现 MainActivity.java
- package hkp.test;
- import android.app.TabActivity;
- import android.content.Intent;
- import android.os.Bundle;
- import android.widget.TabHost;
- public class MainActivity extends TabActivity {
- private TabHost tabHost;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- // TODO Auto-generated method stub
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- tabHost = getTabHost();
- tabHost.addTab(tabHost.newTabSpec("tab1")
- .setIndicator("First")
- .setContent(new Intent(this,FirstGroupTab.class)));//第一个选项卡使用一个ActivityGroup
- tabHost.addTab(tabHost.newTabSpec("tab2")
- .setIndicator("Second")
- .setContent(new Intent(this, SecondTab.class)));//第二个选项卡是一个Activity
- tabHost.setCurrentTab(0);
- }
- }
package hkp.test; import android.app.TabActivity; import android.content.Intent; import android.os.Bundle; import android.widget.TabHost; public class MainActivity extends TabActivity { private TabHost tabHost; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.main); tabHost = getTabHost(); tabHost.addTab(tabHost.newTabSpec("tab1") .setIndicator("First") .setContent(new Intent(this,FirstGroupTab.class)));//第一个选项卡使用一个ActivityGroup tabHost.addTab(tabHost.newTabSpec("tab2") .setIndicator("Second") .setContent(new Intent(this, SecondTab.class)));//第二个选项卡是一个Activity tabHost.setCurrentTab(0); } }
使用 ActivityGroup的管理
- package hkp.test;
- import android.app.ActivityGroup;
- import android.content.Intent;
- import android.os.Bundle;
- import android.view.View;
- import android.view.Window;
- /**
- * @author HuangKaipeng hkp2006@gmail.com
- * 2011-10-5
- *
- */
- public class FirstGroupTab extends ActivityGroup {
- /**
- * 一个静态的ActivityGroup变量,用于管理本Group中的Activity
- */
- public static ActivityGroup group;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- // TODO Auto-generated method stub
- super.onCreate(savedInstanceState);
- group = this;
- }
- @Override
- public void onBackPressed() {
- // TODO Auto-generated method stub
- // super.onBackPressed();
- //把后退事件交给子Activity处理
- group.getLocalActivityManager()
- .getCurrentActivity().onBackPressed();
- }
- @Override
- protected void onResume() {
- // TODO Auto-generated method stub
- super.onResume();
- //把界面切换放到onResume方法中是因为,从其他选项卡切换回来时,
- //调用搞得是onResume方法
- //要跳转的界面
- Intent intent = new Intent(this, FirstActivity.class).
- addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
- //把一个Activity转换成一个View
- Window w = group.getLocalActivityManager().startActivity("FirstActivity",intent);
- View view = w.getDecorView();
- //把View添加大ActivityGroup中
- group.setContentView(view);
- }
package hkp.test; import android.app.ActivityGroup; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.Window; /** * @author HuangKaipeng hkp2006@gmail.com * 2011-10-5 * */ public class FirstGroupTab extends ActivityGroup { /** * 一个静态的ActivityGroup变量,用于管理本Group中的Activity */ public static ActivityGroup group; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); group = this; } @Override public void onBackPressed() { // TODO Auto-generated method stub // super.onBackPressed(); //把后退事件交给子Activity处理 group.getLocalActivityManager() .getCurrentActivity().onBackPressed(); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); //把界面切换放到onResume方法中是因为,从其他选项卡切换回来时, //调用搞得是onResume方法 //要跳转的界面 Intent intent = new Intent(this, FirstActivity.class). addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); //把一个Activity转换成一个View Window w = group.getLocalActivityManager().startActivity("FirstActivity",intent); View view = w.getDecorView(); //把View添加大ActivityGroup中 group.setContentView(view); }
ActivityGroup中的第一个Activity
- package hkp.test;
- import android.app.Activity;
- import android.content.Intent;
- import android.os.Bundle;
- import android.view.View;
- import android.view.Window;
- import android.view.View.OnClickListener;
- import android.widget.Button;
- /**
- * @author HuangKaipeng hkp2006@gmail.com
- * 2011-10-5
- *
- */
- public class FirstActivity extends Activity {
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- // TODO Auto-generated method stub
- super.onCreate(savedInstanceState);
- setContentView(R.layout.first_activity);
- //跳转到第二个界面
- Button btn = (Button) findViewById(R.id.btn);
- btn.setOnClickListener(new OnClickListener() {
- @Override
- public void onClick(View v) {
- // TODO Auto-generated method stub
- Intent intent = new Intent(FirstActivity.this, SecondActivity.class).
- addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
- //把一个Activity转换成一个View
- Window w = FirstGroupTab.group.getLocalActivityManager()
- .startActivity("SecondActivity",intent);
- View view = w.getDecorView();
- //把View添加大ActivityGroup中
- FirstGroupTab.group.setContentView(view);
- }
- });
- }
- }
package hkp.test; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.Window; import android.view.View.OnClickListener; import android.widget.Button; /** * @author HuangKaipeng hkp2006@gmail.com * 2011-10-5 * */ public class FirstActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.first_activity); //跳转到第二个界面 Button btn = (Button) findViewById(R.id.btn); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent = new Intent(FirstActivity.this, SecondActivity.class). addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); //把一个Activity转换成一个View Window w = FirstGroupTab.group.getLocalActivityManager() .startActivity("SecondActivity",intent); View view = w.getDecorView(); //把View添加大ActivityGroup中 FirstGroupTab.group.setContentView(view); } }); } }
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="这个是ActivityGroup中的第一个界面!"
- />
- <Button android:id="@+id/btn"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="跳转到本组中的另一个Activity中"/>
- </LinearLayout>
<?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="这个是ActivityGroup中的第一个界面!" /> <Button android:id="@+id/btn" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="跳转到本组中的另一个Activity中"/> </LinearLayout>