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我在android中有以下屏幕設置。點擊screen1上的按鈕，點擊屏幕2。屏幕2在屏幕底部有2個按鈕。一個按鈕顯示可搜索的listView，另一個按鈕則將您帶回screen1。對於屏蔽1代碼：從一個活動移動到另一個 - android
screen1.java
package com.example.screenchange;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class ScreenChange extends Activity {
/** Called when the activity is first created. */
private Button button01;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button01 = (Button)findViewById(R.id.button01);
button01.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Log.v(this.toString(), "Inside on click listener for screen 2.");
Intent intent = new Intent(v.getContext(), screen2.class);
Log.v(this.toString(), "Intent created. Moving to start activity.");
startActivity(intent);
}
});
}
}
screen1.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:id="@+id/button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Move to screen 2"
/>
</LinearLayout>
Screen2.java：
package com.example.screenchange;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
public class screen2 extends ListActivity {
private Button button02;
private Button button03;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.screen2);
button02 = (Button)findViewById(R.id.button02);
button02.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Log.v(this.toString(), "Button02 clicked.");
Intent intent = new Intent(); //takes control back to screen1.
finish();
}
});
button03 = (Button)findViewById(R.id.button03);
button03.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Log.v(this.toString(), "Button03 clicked.");
ArrayAdapter<String> listView = new ArrayAdapter<String>(v.getContext(), R.layout.listview, COUNTRIES);
setListAdapter(listView);
getListView().setTextFilterEnabled(true);
}
});
}
static final String[] COUNTRIES = new String[] {
"Afghanistan", "Albania", "Algeria", "American Samoa", "Andorra",
"Angola", "Anguilla", "Antarctica", "Antigua and Barbuda", "Argentina",
"Armenia", "Aruba", "Australia", "Austria", "Azerbaijan",
"Bahrain", "Bangladesh", "Barbados", "Belarus", "Belgium",
"Belize", "Benin", "Bermuda", "Bhutan", "Bolivia",
"Bosnia and Herzegovina", "Botswana", "Bouvet Island", "Brazil", "British Indian Ocean Territory",
"British Virgin Islands", "Brunei", "Bulgaria", "Burkina Faso", "Burundi",
"Cote d'Ivoire", "Cambodia", "Cameroon", "Canada", "Cape Verde",
"Cayman Islands", "Central African Republic", "Chad", "Chile", "China",
"Christmas Island", "Cocos (Keeling) Islands", "Colombia", "Comoros", "Congo",
"Cook Islands"
}
screen2.xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="Welcome to screen 2">
<Button
android:id="@+id/button02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Get back to screen 1."
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:clickable="true">
</Button>
<Button
android:id="@+id/button03"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:text="Display countries."
android:clickable="true">
</Button>
<ListView
android:id="@+android:id/android:list"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:text="@id/text1">
</ListView>
</RelativeLayout>
listview.xml：
<?xml version="1.0" encoding="utf-8"?>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/text1">
</TextView>
Android的清單：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.screenchange"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".ScreenChange"
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=".screen2"
android:label="Screen 2 - New actvity.">
</activity>
</application>
</manifest>
我得到的問題如下：
1.屏幕2的按鈕去反應遲鈍我切換到畫面2的時刻。 logcat上沒有輸出，沒有任何東西。
2.甚至可能在獲取列表視圖時出現錯誤，但我無法看到任何內容。
歡迎任何幫助，
Sriram。
嗨斯利拉姆是有什麼毛病我的答案貼在下面。 – Vivek 2011-01-20 13:39:47
@HellBoy：沒有沒有。您發佈的代碼運作良好。我只是做了一些補充，以確保按鈕也有焦點。我在評論中提到你的迴應。 – Sriram 2011-01-21 06:27:27
嗨 我試過這個例子，因爲它是應用程序是強制關閉？ 我用Saurabh的建議有什麼我做錯了嗎？ 謝謝 – 2011-02-08 11:06:05