我在我的Android应用中实现了TabHost。会有3个标签。点击每个标签我想去不同的活动。但当我点击标签时,它突然停止工作。所以可能会有一些错误。我不明白错误
这里是java文件
public class ToDoListActivity extends AppCompatActivity {
TabHost tabHost;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content_todo);
TabHost host = (TabHost)findViewById(R.id.tabHost);
host.setup();
//Tab 1
TabHost.TabSpec tab1 = host.newTabSpec("Tab One");
TabHost.TabSpec tab2 = host.newTabSpec("Tab Two");
TabHost.TabSpec tab3 = host.newTabSpec("Tab Three");
tab1.setContent(new Intent(this,Tab1Activity.class));
//tab1.setContent(R.id.tab1);
tab1.setIndicator("Tab One");
host.addTab(tab1);
//Tab 2
tab2.setContent(new Intent(this,Tab2Activity.class));
//tab2.setContent(R.id.tab2);
tab2.setIndicator("Tab Two");
host.addTab(tab2);
//Tab 3
tab3.setContent(new Intent(this,Tab3Activity.class));
//tab3.setContent(R.id.tab3);
tab3.setIndicator("Tab Three");
host.addTab(tab3);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
这里是相应的xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.emma.kidbox2.ToDoListActivity">
<TabHost
android:id="@+id/tabHost"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/tab1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</LinearLayout>
<LinearLayout
android:id="@+id/tab2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</LinearLayout>
<LinearLayout
android:id="@+id/tab3"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</LinearLayout>
</FrameLayout>
</LinearLayout>
</TabHost>
答案 0 :(得分:0)
更新您的代码如下:
public class ToDoListActivity extends AppCompatActivity {
TabHost tabHost;
LocalActivityManager mlam;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content_todo);
TabHost host = (TabHost)findViewById(R.id.tabHost);
mlam= new LocalActivityManager(this, false);
mlam.dispatchCreate(savedInstanceState);
host.setup(mlam);
//Tab 1
TabHost.TabSpec tab1 = host.newTabSpec("Tab One");
TabHost.TabSpec tab2 = host.newTabSpec("Tab Two");
TabHost.TabSpec tab3 = host.newTabSpec("Tab Three");
tab1.setContent(new Intent(this,Tab1Activity.class));
//tab1.setContent(R.id.tab1);
tab1.setIndicator("Tab One");
host.addTab(tab1);
//Tab 2
tab2.setContent(new Intent(this,Tab1Activity.class));
//tab2.setContent(R.id.tab2);
tab2.setIndicator("Tab Two");
host.addTab(tab2);
//Tab 3
tab3.setContent(new Intent(this,Tab1Activity.class));
//tab3.setContent(R.id.tab3);
tab3.setIndicator("Tab Three");
host.addTab(tab3);
}
@Override
protected void onResume(){
super.onResume();
mlam.dispatchResume();
}
@Override
protected void onPause(){
super.onPause();
mlam.dispatchPause(isFinishing());
}
}