家伙！我正在尝试创建一个“不要再问我”警告对话框弹出框。但是我的代码出了问题。看看这个。它出什么问题了？它不起作用，我想我把它放错了位置。有人能帮助我吗？
package com.example.exemplo;
import java.util.ArrayList;
import java.util.Arrays;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.Typeface;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Toast;
public class Listagem extends Activity
{
public static final String PREFS_NAME = "MyPrefsFile1";
public CheckBox dontShowAgain;
private static class ViewHolder {
public TextView text;
public TextView text2;
public ImageView image;
}
EditText edittext;
ListView listview;
String[] text;
String[] text2;
int[] image = {
R.drawable.wolf;
R.drawable.cat;
};
int textlength = 0;
ArrayList<String> text_sort = new ArrayList<String>();
ArrayList<String> text2_sort = new ArrayList<String>();
ArrayList<Integer> image_sort = new ArrayList<Integer>();
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
@Override
protected void onResume() {
AlertDialog.Builder adb = new AlertDialog.Builder(this);
LayoutInflater adbInflater = LayoutInflater.from(this);
View eulaLayout = adbInflater.inflate(R.layout.checkbox, null);
dontShowAgain = (CheckBox) eulaLayout.findViewById(R.id.skip);
adb.setView(eulaLayout);
adb.setTitle("Attention");
adb.setMessage(Html.fromHtml("How can I see this then?"));
adb.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
String checkBoxResult = "NOT checked";
if (dontShowAgain.isChecked())
checkBoxResult = "checked";
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString("skipMessage", checkBoxResult);
// Commit the edits!
editor.commit();
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://misha.beshkin.lv/android-alertdialog-with-checkbox/")));
return;
}
});
adb.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
String checkBoxResult = "NOT checked";
if (dontShowAgain.isChecked())
checkBoxResult = "checked";
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString("skipMessage", checkBoxResult);
// Commit the edits!
editor.commit();
return;
}
});
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
String skipMessage = settings.getString("skipMessage", "NOT checked");
if (skipMessage != "checked")
adb.show();
super.onResume();
}
}
text = getResources().getStringArray(R.array.text);
text2 = getResources().getStringArray(R.array.text2);
edittext = (EditText) findViewById(R.id.EditText01);
listview = (ListView) findViewById(R.id.ListView01);
listview.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
if ("Howl".equals(text[position])) {
MediaPlayer player = MediaPlayer.create(Listagem.this, R.raw.howl);
player.start();
}
if ("Meow".equals(text[position])) {
MediaPlayer player = MediaPlayer.create(Listagem.this, R.raw.meow);
player.start();
}
});
listview.setAdapter(new MyCustomAdapter(text, text2, image));
edittext.addTextChangedListener(new TextWatcher()
{
public void afterTextChanged(Editable s)
{
}
public void beforeTextChanged(CharSequence s, int start,
int count, int after)
{
}
public void onTextChanged(CharSequence s, int start,
int before, int count)
{
textlength = edittext.getText().length();
text_sort.clear();
text2_sort.clear();
image_sort.clear();
for (int i = 0; i < text.length; i++)
{
if (textlength <= text[i].length())
{
if (edittext.getText().toString().
equalsIgnoreCase((String) text[i].subSequence(0, textlength)))
{
text_sort.add(text[i]);
text2_sort.add(text2[i]);
image_sort.add(image[i]);
}
}
}
listview.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
if ("Howl".equals(text_sort.get(position))) {
MediaPlayer player = MediaPlayer.create(Listagem.this, R.raw.howl);
player.start();
}
if ("Meow".equals(text_sort.get(position))) {
MediaPlayer player = MediaPlayer.create(Listagem.this, R.raw.meow);
player.start();
}
}
});
listview.setAdapter(new MyCustomAdapter
(text_sort, text2_sort, image_sort));
}
});
}
class MyCustomAdapter extends BaseAdapter
{
String[] data_text;
String[] data_text2;
int[] data_image;
MyCustomAdapter()
{
}
MyCustomAdapter(String[] text, String[] text2, int[] image)
{
data_text = text;
data_text2 = text2;
data_image = image;
}
MyCustomAdapter(ArrayList<String> text, ArrayList<String> text2, ArrayList<Integer> image)
{
data_text = new String[text.size()];
data_text2 = new String[text2.size()];
data_image = new int[image.size()];
for(int i=0;i<text.size();i++)
{
data_text[i] = text.get(i);
data_text2[i] = text2.get(i);
data_image[i] = image.get(i);
}
}
public int getCount()
{
return data_text.length;
}
public String getItem(int position)
{
return null;
}
public long getItemId(int position)
{
return position;
}
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder holder;
if (convertView == null) {
LayoutInflater mInflater = getLayoutInflater();
convertView = mInflater.inflate(R.layout.listview, null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.TextView01);
holder.text2 = (TextView) convertView.findViewById(R.id.TextView02);
TextView textview2 = (TextView) convertView.findViewById(R.id.TextView02);
Typeface font1 = Typeface.createFromAsset(getAssets(), "arial.ttf");
textview2.setTypeface(font1, Typeface.NORMAL);
holder.image = (ImageView) convertView.findViewById(R.id.ImageView01);
convertView.setTag(holder);
}else {
holder = (ViewHolder) convertView.getTag();
}
holder.text.setText(data_text[position]);
holder.text2.setText(data_text2[position]);
holder.image.setImageResource(data_image[position]);
return convertView;
}
}
}
答案 0 :(得分：1)
你不能在字符串上使用==和！=
使用
if(!skipMessage.equals("checked"))
而不是
if(skipMessage != "checked")
答案 1 :(得分：1)
==比较字符串引用而不是字符串值。你必须使用.equals()
if (!skipMessage.equals("checked"))
adb.show();