我在应用程序的第一页有搜索栏，当我写入搜索栏时打开搜索助手（帮助列表视图），我想点击打开列表视图的项目并进入app的其他活动< / p>
感谢帮助
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class MainActivity extends Activity {
List<HashMap<String,String>> adp;
// Array of strings storing country names
String[] countries = new String[] {
"India",
"Pakistan",
"Sri Lanka",
"China",
"Bangladesh",
"Nepal",
"Afghanistan",
"North Korea",
"South Korea",
"Japan"
};
// Array of integers points to images stored in /res/drawable-ldpi/
int[] flags = new int[]{
R.drawable.india,
R.drawable.pakistan,
R.drawable.srilanka,
R.drawable.china,
R.drawable.bangladesh,
R.drawable.nepal,
R.drawable.afghanistan,
R.drawable.nkorea,
R.drawable.skorea,
R.drawable.japan
};
// Array of strings to store currencies
String[] currency = new String[]{
"Indian Rupee",
"Pakistani Rupee",
"Sri Lankan Rupee",
"Renminbi",
"Bangladeshi Taka",
"Nepalese Rupee",
"Afghani",
"North Korean Won",
"South Korean Won",
"Japanese Yen"
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Each row in the list stores country name, currency and flag
List<HashMap<String,String>> aList = new ArrayList<HashMap<String,String>>();
for(int i=0;i<10;i++){
HashMap<String, String> hm = new HashMap<String,String>();
hm.put("txt", countries[i]);
hm.put("flag", Integer.toString(flags[i]) );
hm.put("cur", currency[i]);
aList.add(hm);
}
// Keys used in Hashmap
String[] from = { "flag","txt"};
// Ids of views in listview_layout
int[] to = { R.id.flag,R.id.txt};
// Instantiating an adapter to store each items
// R.layout.listview_layout defines the layout of each item
SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), aList, R.layout.autocomplete_layout, from, to);
// Getting a reference to CustomAutoCompleteTextView of activity_main.xml layout file
CustomAutoCompleteTextView autoComplete = ( CustomAutoCompleteTextView) findViewById(R.id.autocomplete);
/** Defining an itemclick event listener for the autocompletetextview */
OnItemClickListener itemClickListener = new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
}
};
/** Setting the itemclick event listener */
autoComplete.setOnItemClickListener(itemClickListener);
/** Setting the adapter to the listView */
autoComplete.setAdapter(adapter);
}
/** A callback method, which is executed when this activity is about to be killed
* This is used to save the current state of the activity
* ( eg : Configuration changes : portrait -> landscape )
*/
@Override
protected void onSaveInstanceState(Bundle outState) {
TextView tvCurrency = (TextView) findViewById(R.id.tv_currency) ;
outState.putString("currency", tvCurrency.getText().toString());
super.onSaveInstanceState(outState);
}
/** A callback method, which is executed when the activity is recreated
* ( eg : Configuration changes : portrait -> landscape )
*/
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
TextView tvCurrency = (TextView) findViewById(R.id.tv_currency) ;
tvCurrency.setText(savedInstanceState.getString("currency"));
super.onRestoreInstanceState(savedInstanceState);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
答案 0 :(得分：2)
首先声明您的活动将在AndroidManifest中启动。
<application
...
<activity
android:name="com.hello.world.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.hello.world.MyNextActivity"/>
...
</application>
现在在项目点击监听器中执行此操作
/** Defining an itemclick event listener for the autocompletetextview */
OnItemClickListener itemClickListener = new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
Intent intent = new Intent(MainActivity.this, MyNextActivity.class);
//Get the value of the item you clicked
String itemClicked = countries[position];
intent.putExtra("country", itemClicked);
startActivity(intent);
}
};
现在，您在下一个活动中检索onCreate
中的值protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.download_pads_layout);
String country = getIntent().getStringExtra("country");
}
答案 1 :(得分：2)
在当前活动中
countries.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
if (position == 0) {
Intent india = new Intent(MainActivity.this, newActivityIndia.class);
startActivity(india);
}
else if (position == 1) {
Intent pakistan = new Intent(MainActivity.this, newActivityPakistan.class);
startActivity(pakistan);
}
else if (position == 2) {
Intent shriLanka = new Intent(MainActivity.this, newActivityShriLanka.class);
startActivity(shriLanka);
}
else if (position == 3) {
Intent china= new Intent(MainActivity.this, newActivityChina.class);
startActivity(china);
}
else if (position == 4) {
Intent bangladesh= new Intent(MainActivity.this, newActivityBangladesh.class);
startActivity(bangladesh);
}
else if (position == 5) {
Intent nepal= new Intent(MainActivity.this, newActivityNepal.class);
startActivity(nepal);
}
else if (position == 6) {
Intent afghanistan = new Intent(MainActivity.this, newActivityAfghanistan.class);
startActivity(afghanistan);
}
else if (position == 7) {
Intent northKorea= new Intent(MainActivity.this, newActivityNorthKorea.class);
startActivity(northKorea);
}
else if (position == 8) {
Intent southKorea= new Intent(MainActivity.this, newActivitySouthKorea.class);
startActivity(southKorea);
}
else if (position == 9) {
Intent japan= new Intent(MainActivity.this, newActivityJapan.class);
startActivity(japan);
}
}
};
答案 2 :(得分：0)
您可以使用switch语句，例如
adapter= new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_list_item_1, arrayCountry);
listView.setAdapter(adapter);
getResources().getStringArray(R.array.array_country);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
switch (position) {
case 0:
startActivity(new Intent(MainActivity.this, ActivityAustralia.class));break;
case 1:
startActivity(new Intent(MainActivity.this, ActivityJapan.class));break;
case 2:
startActivity(new Intent(MainActivity.this, ActivityChina.class));break;
}
}
});
listView.setAdapter(adapter);
}