将微调器控件添加到布局时出现错误。
我无法弄清楚为什么会这样。下面是代码和stacktrace可以帮助我吗？
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:id="@+id/amritsarimageid"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:background="@drawable/layout_background"
android:orientation="vertical" >
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/radio_border" >
<TableRow>
<ImageView
android:id="@+id/amritsarimageid"
android:layout_width="100dp"
android:layout_height="40dp"
android:scaleType="fitXY"
android:src="@drawable/amritsar" />
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TableRow>
<TextView
android:id="@+id/heading"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:tag="@string/background_splash"
android:text="HukumNama Darbar Sahib, Amritsar"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="@android:color/white"
android:textSize="12sp"
android:textStyle="bold" />
</TableRow>
<TableRow>
<TextView
android:id="@+id/lastupdated"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Last updated on:"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@android:color/white"
android:textStyle="italic" />
</TableRow>
</TableLayout>
</TableRow>
</TableLayout>
<TextView
android:id="@+id/link"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<RadioGroup
android:id="@+id/radioSelectOption"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:dividerPadding="0dp"
android:orientation="vertical" >
<RadioButton
android:id="@+id/amrRadioReadPunjabi"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:checked="true"
android:onClick="onRadioButtonClicked"
android:text="@string/lang1"
android:textColor="@android:color/black"
android:textSize="12sp" />
<RadioButton
android:id="@+id/amrRadioTransliteration"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:onClick="onRadioButtonClicked"
android:text="Punjabi Transliteration"
android:textColor="@android:color/black"
android:textSize="12sp" />
<com.google.ads.AdView
android:id="@+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
ads:adSize="BANNER"
ads:adUnitId="a15131e8f06efd9"
ads:loadAdOnCreate="true" />
<RadioButton
android:id="@+id/amrRadioPunjabiMeaning"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:onClick="onRadioButtonClicked"
android:text="Punjabi Vyakhya(Meaning)"
android:textColor="@android:color/black"
android:textSize="12sp" />
<!--
<RadioButton
android:id="@+id/radioHindi"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:onClick="onRadioButtonClicked"
android:text="Hindi Mein Padhiye"
android:textColor="@android:color/black"
android:textSize="12sp" />
-->
<RadioButton
android:id="@+id/amrRadioEnglishTranslation"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:onClick="onRadioButtonClicked"
android:text="@string/eng_translate"
android:textColor="@android:color/black"
android:textSize="12sp" />
</RadioGroup>
<Spinner
android:id="@+id/amrSpinnerFontSize"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:entries="@array/font_sizes"
android:prompt="@string/font_size_prompt" />
<ScrollView
android:id="@+id/scroll1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="20dp"
android:background="@drawable/white_background" >
<TextView
android:id="@+id/amrTxtContent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:text="Loading Hukumnama Details"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@android:color/black"
android:textIsSelectable="true" />
</ScrollView>
</LinearLayout>
活动代码：
public class AmritsarActivity extends Activity {
private static final String PLAY_URL = "<a href='https://play.google.com/store/apps/details?id=com.gurbani.gurbanidaily'>Rate us on Google Play</a>";
static DataLoaderAmritsar urlreaderinstance = null;
static TextView textView = null;
String PATH = null;
String currdate = "";
HukumNamaDetails hdetails = new HukumNamaDetails();
AmritsarActivity amractivity = this;
/*
* (non-Javadoc)
*
* @see android.app.Activity#onCreate(android.os.Bundle)
*/
public void onCreate(Bundle savedInstanceState) {
System.out.println("In Amritsar activity");
super.onCreate(savedInstanceState);
setContentView(R.layout.amritsar);
String htmllinktext = PLAY_URL;
TextView linktxt = (TextView) findViewById(R.id.link);
linktxt.setText(Html.fromHtml(htmllinktext));
linktxt.setMovementMethod(LinkMovementMethod.getInstance());
textView = (TextView) findViewById(R.id.amrTxtContent);
TextView lastupdatedtxt = (TextView) findViewById(R.id.lastupdated);
Intent i = getIntent();
hdetails = (HukumNamaDetails) i.getParcelableExtra("hdetails");
System.out.println("hdetails" + hdetails);
// Look up the AdView as a resource and load a request.
AdView adView = (AdView) this.findViewById(R.id.adView);
AdRequest adrequest = new AdRequest();
adView.loadAd(adrequest);
try {
currdate = Utils.getCurrentDate();
System.out.println("Loading it in UI");
textView.setText(hdetails.getHukumnama_punjabi().replace("�", ":"));
textView.setTypeface(Typeface.createFromAsset(getAssets(),
"fonts/punjabi.ttf"));
lastupdatedtxt.setText(lastupdatedtxt.getText() + " "
+ hdetails.getHdate());
System.out.println("UI loaded--Gen pdf");
} catch (Exception e) {
System.out.println("Exception" + e);
e.printStackTrace();
}
}
/**
* @param view
*/
public void onRadioButtonClicked(View view) {
// Check which radio button was clicked
try {
switch (view.getId()) {
case R.id.amrRadioReadPunjabi:
if ((hdetails.getHukumnama_punjabi() != null)
|| (!hdetails.getHukumnama_punjabi().equals(""))) {
System.out.println(hdetails.getHukumnama_punjabi() + "text"
+ textView.getId());
textView.setText(hdetails.getHukumnama_punjabi().replace(
"�", ":"));
textView.setVisibility(View.VISIBLE);
textView.setTypeface(Typeface.createFromAsset(getAssets(),
"fonts/punjabi.ttf"));
textView.setTextSize(15);
} else {
textView.setText("Unable to fetch Hukamnama at this time, Please try again later");
textView.setVisibility(View.VISIBLE);
}
break;
case R.id.amrRadioPunjabiMeaning:
if ((hdetails.getPunjabi_vyakhya() != null)
|| (!hdetails.getBan_punjabi_vyakhya().equals(""))) {
textView.setText(hdetails.getPunjabi_vyakhya().replace("�",
":"));
textView.setVisibility(View.VISIBLE);
textView.setTypeface(Typeface.createFromAsset(getAssets(),
"fonts/punjabi.ttf"));
} else {
textView.setText("Unable to fetch Hukamnama at this time, Please try again later");
textView.setVisibility(View.VISIBLE);
}
break;
case R.id.amrRadioEnglishTranslation:
if ((hdetails.getEnglish_translation() != null)
|| (!hdetails.getEnglish_translation().equals(""))) {
System.out.println(hdetails.getEnglish_translation()
+ "text" + textView.getId());
textView.setText(hdetails.getEnglish_translation().replace(
"�", ":"));
textView.setTypeface(Typeface.DEFAULT);
textView.setVisibility(View.VISIBLE);
} else {
textView.setText("Unable to fetch Hukamnama at this time, Please try again later");
textView.setVisibility(View.VISIBLE);
}
break;
/*
* case R.id.radioHindi :
* System.out.println("getHindi_translation--" +
* hdetails.getHindi_translation());
* textView.setText(hdetails.getHindi_translation
* ().replace("�",":")); textView.setVisibility(View.VISIBLE);
* textView.setTypeface(Typeface.createFromAsset(getAssets(),
* "fonts/hindi.ttf")); break;
*/
case R.id.amrRadioTransliteration:
if ((hdetails.getAmrEnglish_transliteration() != null)
|| (!hdetails.getAmrEnglish_transliteration()
.equals(""))) {
System.out.println("Transliteration--"
+ hdetails.getAmrEnglish_transliteration());
textView.setText(hdetails.getAmrEnglish_transliteration()
.replace("�", ":"));
textView.setTypeface(Typeface.DEFAULT);
textView.setVisibility(View.VISIBLE);
} else {
textView.setText("Unable to fetch Hukamnama at this time, Please try again later");
textView.setVisibility(View.VISIBLE);
}
break;
}
} catch (Exception e) {
e.printStackTrace();
System.out.println("Exception" + e);
}
}}
错误堆栈跟踪：
09-15 17:51:16.278: E/AndroidRuntime(31898): FATAL EXCEPTION: main
09-15 17:51:16.278: E/AndroidRuntime(31898): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gurbani.gurbanidaily/com.gurbani.gurbanidaily.MainActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gurbani.gurbanidaily/com.gurbani.gurbanidaily.AmritsarActivity}: java.lang.ClassCastException: android.widget.RadioGroup cannot be cast to android.widget.TextView
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2065)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2090)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.ActivityThread.access$600(ActivityThread.java:136)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1201)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.os.Handler.dispatchMessage(Handler.java:99)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.os.Looper.loop(Looper.java:137)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.ActivityThread.main(ActivityThread.java:4802)
09-15 17:51:16.278: E/AndroidRuntime(31898): at java.lang.reflect.Method.invokeNative(Native Method)
09-15 17:51:16.278: E/AndroidRuntime(31898): at java.lang.reflect.Method.invoke(Method.java:511)
09-15 17:51:16.278: E/AndroidRuntime(31898): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:813)
09-15 17:51:16.278: E/AndroidRuntime(31898): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:580)
09-15 17:51:16.278: E/AndroidRuntime(31898): at dalvik.system.NativeStart.main(Native Method)
09-15 17:51:16.278: E/AndroidRuntime(31898): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gurbani.gurbanidaily/com.gurbani.gurbanidaily.AmritsarActivity}: java.lang.ClassCastException: android.widget.RadioGroup cannot be cast to android.widget.TextView
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2065)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.ActivityThread.startActivityNow(ActivityThread.java:1906)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:694)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.widget.TabHost.setCurrentTab(TabHost.java:358)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.widget.TabHost.addTab(TabHost.java:236)
09-15 17:51:16.278: E/AndroidRuntime(31898): at com.gurbani.gurbanidaily.MainActivity.onCreate(MainActivity.java:60)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.Activity.performCreate(Activity.java:5013)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2029)
09-15 17:51:16.278: E/AndroidRuntime(31898): ... 11 more
09-15 17:51:16.278: E/AndroidRuntime(31898): Caused by: java.lang.ClassCastException: android.widget.RadioGroup cannot be cast to android.widget.TextView
09-15 17:51:16.278: E/AndroidRuntime(31898): at com.gurbani.gurbanidaily.AmritsarActivity.onCreate(AmritsarActivity.java:47)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.Activity.performCreate(Activity.java:5013)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
09-15 17:51:16.278: E/AndroidRuntime(31898): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2029)
09-15 17:51:16.278: E/AndroidRuntime(31898): ... 21 more
答案 0 :(得分：0)
请不要将TextView textView用作静态变量。通过使其成为静态变量，它没有被正确初始化，Compiler在textView和它的父视图（即RadioGroup）之间变得混乱。因此，它提供了一个运行时ClassCastException
我希望这会有所帮助。