我希望 listview1 打开我的包中定义的一些 Activity ，并且在这些 Activity 上我重新定义了一个新的 listview2 Activity 。
我尝试编写相同的代码。 请查看代码以了解问题。
public class ABC extends ListActivity{
String classNames[] = {"A","B","C"};
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,classNames));
}
protected void onListItemClick(ListView lv, View v, int position, long id){
super.onListItemClick(lv, v, position, id);
String openClass = classNames[position];
try{
Class selected = Class.forName("com.lab.example."+openClass);
Intent selectedIntent = new Intent(this, selected);
startActivity(selectedIntent);
}
catch(ClassNotFoundException e){
e.printStackTrace();
}
}
上面源代码中的a,b,c类可以在listview中看到。但是当我点击 A 时，什么也没有发生。
我想知道
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setListAdapter(new ArrayAdapter<String> (this,android.R.layout.simple_list_item_1,classNames));
}
如何在上面添加自定义布局
同时对于 A类:-
public class A extends ListActivity{
String classNames[] = {"x1","x2","x3"};
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, classNames));
}
protected void onListItemClick(ListView lv, View v, int position, long id){
super.onListItemClick(lv, v, position, id);
String openClass = classNames[position];
try{
Class selected = Class.forName("com.lab.example."+openClass);
Intent selectedIntent = new Intent(this, selected);
startActivity(selectedIntent);
}
catch(ClassNotFoundException e){
e.printStackTrace();
}
}
on the above source code x1,x2,x3 class activites are working for A only
而X1:-
public class X1 extends Activity {
// List view
private ListView lv;
// Listview Adapter
ArrayAdapter<String> adapter;
// Search EditText
EditText inputSearch;
// ArrayList for Listview
ArrayList<HashMap<String, String>> productList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Listview Data
String products[] = getResources().getStringArray(R.array.X1);
lv = (ListView) findViewById(R.id.list_view11);
inputSearch = (EditText) findViewById(R.id.inputSearch11);
// Adding items to listview
adapter = new ArrayAdapter<String>(this, R.layout.list, R.id.route, products);
lv.setAdapter(adapter);
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
X1.this.adapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
}
}
list :-
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.lab.example"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.lab.example.MainActivitypage"
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=".Menu"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<intent-filter>
<action android:name="com.lab.example.Menu" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity android:name="com.lab.example.ABC" />
<activity android:name="com.lab.example.A" />
<activity android:name="com.lab.example.B" />
<activity android:name="com.lab.example.C" />
<activity android:name="com.lab.example.X1" />
<activity android:name="com.lab.example.X2" />
<activity android:name="com.lab.example.X3" />
日志 cat 中显示的错误:-
日志中充满了这个错误，没有别的，因为我是 Android 新手，无法理解这一点:-
03-14 23:16:55.970: E/PGA(3459): PgaSocketWriteAllHdipc: hd_ipc_send() failed
03-14 22:32:23.810: E/InputDispatcher(1304): channel 'b466cb20 com.lab.example/com.lab.example.ABC (server)' ~ Channel is unrecoverably broken and will be disposed!
03-14 22:34:45.480: E/ALSALib(1293): external/alsa-lib/src/confmisc.c:136: (snd_config_get_bool) Invalid type for nonblock
我希望当我单击 A->X1 时开始 Activity 。 如果我不清楚，请在下面的评论中提及。 任何形式的建议都值得赞赏。
最佳答案
将 classNames 数组 A ListActivity 更改为:
String classNames[] = {"X1","X2","X3"};
因为您在 AndroidManifest.xml 中使用 X1、X2 和 X3 类名声明 Activity
关于java - listview 1 Activity 用于打开 listview 2 Activity ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15415202/