将Tabhost添加到android项目
[英]Adding a Tabhost to an android project
问题描述
I'm following the sample provided in this link to create a TabHost. 
我正在按照此链接中提供的示例创建TabHost。 But I got "Fatal Exception" error. 但是我收到“致命异常”错误。 --> http://developer.android.com/reference/android/app/TabActivity.html -> http://developer.android.com/reference/android/app/TabActivity.html
activity_main.xml activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="polimi.aap.yas.personalhealthrecord.MainActivity">
<android.support.v4.app.FragmentTabHost
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TabWidget
android:id="@android:id/tabs"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"/>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0"/>
<FrameLayout
android:id="@+id/realtabcontent"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
</LinearLayout>
</android.support.v4.app.FragmentTabHost>
</RelativeLayout>
MainActivity.java MainActivity.java
package polimi.aap.yas.personalhealthrecord;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
public class MainActivity extends FragmentActivity {
private FragmentTabHost mTabHost;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTabHost = (FragmentTabHost)findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
mTabHost.addTab(mTabHost.newTabSpec("t1").setIndicator("Login"),Login.class,null);
mTabHost.addTab(mTabHost.newTabSpec("t2").setIndicator("Register"),SignUp.class,null);
}
}
build.gradle (module:app) build.gradle（module：app）
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.1"
useLibrary 'org.apache.http.legacy'
defaultConfig {
applicationId "polimi.aap.yas.personalhealthrecord"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:support-v4:23.1.1'
}
And finally this the logcat 最后是logcat
12-09 14:53:14.184 3570-3570/?
Do you see any problem? 你有什么问题吗？ thank you in advance for your helps. 预先感谢您的帮助。 Let me add my objective by writing this code also. 让我也通过编写此代码来添加我的目标。 I need to have a tabhost to show two tabs (Login and Register). 我需要一个tabhost来显示两个选项卡（“登录”和“注册”）。 and fill the content of each tab by related layout(login.xml and signup.xml). 并按相关布局（login.xml和signup.xml）填充每个选项卡的内容。
Login.java Login.java
package polimi.aap.yas.personalhealthrecord;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class Login extends AppCompatActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
}
1 个解决方案
解决方案1
0 已采纳 2015-12-09 20:49:39
Your problem is that your Login class is an AppCompatActivity , and not a Fragment . 您的问题是您的Login类是AppCompatActivity ，而不是Fragment 。
When you add a tab to the TabHost , you should pass a .class as you did. 将选项卡添加到TabHost ，应该像以前那样传递.class 。 However, this .class should be from a defined Fragment , not AppCompatActivity . 但是，此.class应该来自已定义的Fragment ，而不是AppCompatActivity 。
So it should be 所以应该
mTabHost.addTab(mTabHost.newTabSpec("t1").setIndicator("Login"),Login.class,null);
where 哪里
public class Login extends Fragment {
/**/
}
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