使用选项卡从其他 Activity 启动 Activity [英] start Activity from an other Activity with Tabs
本文介绍了使用选项卡从其他 Activity 启动 Activity的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个包含 3 个标签的应用.每个选项卡都有一个活动，并且有一个活动两个管理选项卡.这工作正常，我可以从选项卡切换到选项卡.但现在我想通过按下另一个选项卡上的按钮来切换到一个选项卡.我尝试这样开始活动:
final Intent openTabMainActivity = new Intent(this,TabMainActivity.class);startActivity(openTabMainActivity);
这将启动选项卡前面的活动.但我只想切换到活动.
这是管理标签的活动(我是 Android 新手，我从教程中获得了这段代码):
公共类 MainActivity 扩展 TabActivity {/** 在第一次创建活动时调用.*/@覆盖公共无效 onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);TabHost tabHost = getTabHost();//主选项卡TabSpec mainspec = tabHost.newTabSpec("Main");//设置标签的标题和图标mainspec.setIndicator("Main", getResources().getDrawable(R.drawable.icon_main_tab));意图 mainIntent = new Intent(this, TabMainActivity.class);mainspec.setContent(mainIntent);//图表标签TabSpec graphspec = tabHost.newTabSpec("Graph");graphspec.setIndicator("Graph", getResources().getDrawable(R.drawable.icon_graph_tab));Intent graphIntent = new Intent(this, TabGraphActivity.class);graphspec.setContent(graphIntent);//选项卡TabSpec optionspec = tabHost.newTabSpec("Option");optionspec.setIndicator("选项", getResources().getDrawable(R.drawable.icon_option_tab));Intent optionIntent = new Intent(this, TabOptionActivity.class);optionspec.setContent(optionIntent);//将所有 TabSpec 添加到 TabHosttabHost.addTab(mainspec);tabHost.addTab(graphspec);tabHost.addTab(optionspec);}}
解决方案
请写下面的代码，它会解决你的问题.
ActivityStack.java
私有栈堆;@覆盖公共无效 onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);如果(堆栈==空)堆栈=新堆栈<字符串>()；//启动默认活动push("FirstStackActivity", new Intent(this, Tab_SampleActivity.class));}@覆盖公共无效finishFromChild(活动孩子){流行音乐();}@覆盖公共无效 onBackPressed() {流行音乐();}公共无效推送(字符串ID，意图意图){窗口窗口 = getLocalActivityManager().startActivity(id, intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));如果(窗口！= null){stack.push(id);setContentView(window.getDecorView());}}公共无效弹出(){如果 (stack.size() == 1)结束();LocalActivityManager 管理器 = getLocalActivityManager();manager.destroyActivity(stack.pop(), true);if (stack.size() > 0) {意图 lastIntent = manager.getActivity(stack.peek()).getIntent();窗口 newWindow = manager.startActivity(stack.peek(), lastIntent);setContentView(newWindow.getDecorView());}} TabActivity.java
公共类 TabActivity 扩展 TabActivity {/** 在第一次创建活动时调用.*/@覆盖公共无效 onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.tab_screen);TabHost tabHost = getTabHost();Intent 意图 = new Intent().setClass(this, ActivityStack.class);TabHost.TabSpec 规范 = tabHost.newTabSpec("tabId").setIndicator("Temp", getResources().getDrawable(R.drawable.home));规范集内容(意图)；tabHost.addTab(spec);Intent intent1 = new Intent().setClass(this, ActivityStack.class);TabHost.TabSpec spec1 = tabHost.newTabSpec("tabId").setIndicator("Temp", getResources().getDrawable(R.drawable.invoice));spec1.setContent(intent1);tabHost.addTab(spec1);tabHost.setCurrentTab(0);}}FirstActivity.java
公共类 FirstActivity 扩展 Activity {@覆盖公共无效 onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);TextView textView = new TextView(this);textView.setText("选项卡示例活动");textView.setOnClickListener(new View.OnClickListener() {@覆盖公共无效 onClick(查看 v){意图意图 = new Intent();intent.setClass(getParent(), SecondActivity.class);ActivityStack activityStack = (ActivityStack) getParent();activityStack.push("SecondActivity", 意图);}});设置内容视图(文本视图)；}}SecondActivity.java
公共类 SecondActivity 扩展 Activity {@覆盖公共无效 onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);TextView textView = new TextView(this);textView.setText("第一个堆栈活动");textView.setOnClickListener(new View.OnClickListener() {@覆盖公共无效 onClick(查看 v){意图意图 = new Intent();intent.setClass(getParent(), ThirdActivity.class);ActivityStack activityStack = (ActivityStack) getParent();activityStack.push("ThirdActivity", 意图);}});设置内容视图(文本视图)；}}ThirdActivity.java
公共类 ThirdActivity 扩展 Activity {@覆盖protected void onCreate(Bundle savedInstanceState) {//TODO 自动生成的方法存根super.onCreate(savedInstanceState);设置内容视图(R.layout.main)；}}将以下 XML 文件添加到您的 res/layout 文件夹中.
1) tab_screen.xml
<?xml version="1.0" encoding="utf-8"?><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" ><相对布局android:layout_width="fill_parent"android:layout_height="fill_parent"机器人:方向=垂直"android:padding="3dp" ><框架布局android:id="@android:id/tabcontent"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_above="@android:id/tabs"android:layout_weight="1"/>2) main.xml
<?xml version="1.0" encoding="utf-8"?><线性布局 xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="垂直"><文本视图android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="@string/hello"/></线性布局>AndroidManifest.xml:-
<?xml version="1.0" encoding="utf-8"?><清单 xmlns:android="http://schemas.android.com/apk/res/android"包="com.android.tabsample"安卓:版本代码=1"android:versionName="1.0" ><使用-sdk android:minSdkVersion="8"/><应用android:icon="@drawable/ic_launcher"android:label="@string/app_name" ><活动android:name=".FirstActivity"android:label="@string/app_name" ><意图过滤器><action android:name="android.intent.action.MAIN"/><类别 android:name="android.intent.category.DEFAULT"/></意图过滤器></活动><活动android:name=".TabActivity"android:label="@string/app_name" ><意图过滤器><action android:name="android.intent.action.MAIN"/><类别 android:name="android.intent.category.LAUNCHER"/></意图过滤器></活动><活动android:name=".ActivityStack"android:label="@string/app_name" ><意图过滤器><action android:name="android.intent.action.MAIN"/><类别 android:name="android.intent.category.DEFAULT"/></意图过滤器></活动><活动android:name=".SecondActivity"android:label="@string/app_name" ><意图过滤器><action android:name="android.intent.action.MAIN"/><类别 android:name="android.intent.category.DEFAULT"/></意图过滤器></活动><活动android:name=".ThirdActivity"android:label="@string/app_name" ><意图过滤器><action android:name="android.intent.action.MAIN"/><类别 android:name="android.intent.category.DEFAULT"/></意图过滤器></活动></应用程序></清单>有关完整示例的更多信息，请参见下面的链接.
I got an app with 3 tabs. Every tab has an activity and there is one activity two manage the tabs. This works fine and I can switch from tab to tab. But now i want to switch to a tab by pressing a Button on an other tab. I tried to start the activity like this:
final Intent openTabMainActivity = new Intent(this,TabMainActivity.class);
startActivity(openTabMainActivity);
This starts the Activity infront of the tabs. But I only want to switch to the activity.
This is the activity to manage the tabs (I am new at Android and I got this code from a tutorial):
public class MainActivity extends TabActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TabHost tabHost = getTabHost();
// Tab for Main
TabSpec mainspec = tabHost.newTabSpec("Main");
// setting Title and Icon for the Tab
mainspec.setIndicator("Main", getResources().getDrawable(R.drawable.icon_main_tab));
Intent mainIntent = new Intent(this, TabMainActivity.class);
mainspec.setContent(mainIntent);
// Tab for Graph
TabSpec graphspec = tabHost.newTabSpec("Graph");
graphspec.setIndicator("Graph", getResources().getDrawable(R.drawable.icon_graph_tab));
Intent graphIntent = new Intent(this, TabGraphActivity.class);
graphspec.setContent(graphIntent);
// Tab for Option
TabSpec optionspec = tabHost.newTabSpec("Option");
optionspec.setIndicator("Option", getResources().getDrawable(R.drawable.icon_option_tab));
Intent optionIntent = new Intent(this, TabOptionActivity.class);
optionspec.setContent(optionIntent);
// Adding all TabSpec to TabHost
tabHost.addTab(mainspec);
tabHost.addTab(graphspec);
tabHost.addTab(optionspec);
}
}
解决方案
Please write below code for that, it will solve your problem.
ActivityStack.java
private Stack<String> stack;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (stack == null)
stack = new Stack<String>();
// start default activity
push("FirstStackActivity", new Intent(this, Tab_SampleActivity.class));
}
@Override
public void finishFromChild(Activity child) {
pop();
}
@Override
public void onBackPressed() {
pop();
}
public void push(String id, Intent intent) {
Window window = getLocalActivityManager().startActivity(id, intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
if (window != null) {
stack.push(id);
setContentView(window.getDecorView());
}
}
public void pop() {
if (stack.size() == 1)
finish();
LocalActivityManager manager = getLocalActivityManager();
manager.destroyActivity(stack.pop(), true);
if (stack.size() > 0) {
Intent lastIntent = manager.getActivity(stack.peek()).getIntent();
Window newWindow = manager.startActivity(stack.peek(), lastIntent);
setContentView(newWindow.getDecorView());
}
}
TabActivity.java
public class TabActivity extends TabActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tab_screen);
TabHost tabHost = getTabHost();
Intent intent = new Intent().setClass(this, ActivityStack.class);
TabHost.TabSpec spec = tabHost.newTabSpec("tabId").setIndicator("Temp", getResources().getDrawable(R.drawable.home));
spec.setContent(intent);
tabHost.addTab(spec);
Intent intent1 = new Intent().setClass(this, ActivityStack.class);
TabHost.TabSpec spec1 = tabHost.newTabSpec("tabId").setIndicator("Temp", getResources().getDrawable(R.drawable.invoice));
spec1.setContent(intent1);
tabHost.addTab(spec1);
tabHost.setCurrentTab(0);
}
}
FirstActivity.java
public class FirstActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView textView = new TextView(this);
textView.setText("Tab Sample Activity ");
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setClass(getParent(), SecondActivity.class);
ActivityStack activityStack = (ActivityStack) getParent();
activityStack.push("SecondActivity", intent);
}
});
setContentView(textView);
}
}
SecondActivity.java
public class SecondActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView textView = new TextView(this);
textView.setText("First Stack Activity ");
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setClass(getParent(), ThirdActivity.class);
ActivityStack activityStack = (ActivityStack) getParent();
activityStack.push("ThirdActivity", intent);
}
});
setContentView(textView);
}
}
ThirdActivity.java
public class ThirdActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
Add Below XML files into your res/layout folder.
1) tab_screen.xml
<?xml version="1.0" encoding="utf-8"?>
<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" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:padding="3dp" >
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="@android:id/tabs"
android:layout_weight="1" />
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" />
</RelativeLayout>
</TabHost>
2) main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>
AndroidManifest.xml:-
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.tabsample"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".FirstActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".TabActivity"
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=".ActivityStack"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".SecondActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".ThirdActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
And see below link for more information with complete example.
Multiple Android Activities in a TabActivity
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