【发布时间】:2011-02-21 19:56:35
【问题描述】:
我正在制作我的第一个正式应用程序以投放市场,我想知道如果我只是使用它们来提取文本,那么 120 多个新活动会不会太多?如果是这样,有没有办法可以将 MysecondActivity 变成一个巨大的 if 或 switch 语句? 这是我在更改案例 0 的书中找到的示例:一旦我得到答案,我将更改其余部分,类似于案例 0。
提前感谢您,对于混乱的代码和写作感到抱歉
AndroidManifest.xml
<activity android:name=".MySecondActivity" />
ListActivityExample.java
import android.app.ListActivity;
import android.app.SearchManager;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;
public class ListActivityExample extends ListActivity{
static final String[] ACTIVITY_CHOICES = new String[] {
"Open new Actvity",
"Open Contacts",
"Open Phone Dialer Example",
"Search Google Example",
"Start Voice Command"
};
final String searchTerms = "superman";
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, ACTIVITY_CHOICES));
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
getListView().setTextFilterEnabled(true);
getListView().setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3){
switch(arg2) {
case 0: //opens new screen
{Intent intent = new Intent(ListActivityExample.this,MySecondActivity.class);
startActivity(intent);
break;}
case 1: //opens phone dialer and fills in the given number
{
startActivity(new Intent(Intent.ACTION_VIEW,
Uri.parse("content://contacts/people/")));
break;}
case 2:
{
startActivity(new Intent(Intent.ACTION_VIEW,
Uri.parse("tel:12125551212")));
break;}
case 3: //
{
Intent intent1= new Intent(Intent.ACTION_WEB_SEARCH);
intent1.putExtra(SearchManager.QUERY, searchTerms);
startActivity(intent1);
break;}
case 4: //
{startActivity(new
Intent(Intent.ACTION_VOICE_COMMAND));
break;}
default: break;
}
}
});
}
}
MySecondActivity.java
mport android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class MySecondActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView tv = new TextView(this);
tv.setText("text here");
setContentView(tv);
}
}
【问题讨论】:
标签: android switch-statement android-intent