我有一个复选框，我希望默认情况下取消选中它。即假。 在手动选中复选框时，即如果选中该复选框，它将在另一个类中执行某些操作。
我尝试使用SharedPreference保存复选框的状态，但是当我尝试使用GetBoolean获取另一个类中的复选框值时，我没有得到保存的值。
我的布局xml文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Number of Circle" />
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10" >
</EditText>
<CheckBox
android:id="@+id/chkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/enable_touch_checkBox"
/>
<Button
android:id="@+id/buttonAlert"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView1"
android:layout_marginTop="131dp"
android:text="save"
/>
</LinearLayout>
MyPreferenceActivity类
package de.vogella.android.wallpaper;
import android.app.Activity;
import android.app.WallpaperManager;
import android.content.ComponentName;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;
public class MyPreferencesActivity extends Activity {
private PrefManager pref;
private TextView txtGoogleUsername, txtNoOfCircles, txtGalleryName;
private CheckBox checkBox ;
private Button btnSave;
private Boolean checkBoxValue;
private static final String PREF_NAME = "wallpaper";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
txtNoOfCircles = (TextView) findViewById(R.id.editText1);
checkBox = (CheckBox) findViewById(R.id.chkBox1);
btnSave = (Button) findViewById(R.id.buttonAlert);
pref = new PrefManager(getApplicationContext());
txtNoOfCircles.setText(String.valueOf(pref.getNoOfGridCircles()));
//checkBox.setChecked(pref.getCheckBox());
/********************************/
SharedPreferences sharedPreferences =PreferenceManager.getDefaultSharedPreferences(this);
checkBoxValue = sharedPreferences.getBoolean("Box", false);
if(checkBoxValue){
checkBox.setChecked(true);
}
else
{
checkBox.setChecked(false);
}
/********************************/
/*saveLogin = pref.getCheckBox();
if(saveLogin == true){
checkBox.setChecked(true);
}*/
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//savePreferences("Box", checkBox.isChecked());
if(checkBox.isChecked())
{
//pref.setCheckBox(true);
savePreferences("Box", checkBox.isChecked());
Toast.makeText(getApplicationContext(),
"hii",
Toast.LENGTH_LONG).show();
}
else
{
savePreferences("Box", checkBox.isChecked());
//pref.setCheckBox(false);
}
boolean vals = pref.getCheckBox();
//checkBox = (CheckBox) findViewById(R.id.chkBox1);
String no_of_columns = txtNoOfCircles.getText().toString()
.trim();
//checkBox.get
if (no_of_columns.length() == 0 || !isInteger(no_of_columns)) {
Toast.makeText(getApplicationContext(),
getString(R.string.toast_enter_valid_number),
Toast.LENGTH_LONG).show();
return;
}
if(no_of_columns != null || no_of_columns.equals(" ") )
{
if (!no_of_columns.equalsIgnoreCase(String.valueOf(pref
.getNoOfGridCircles()))) {
// User changed the settings
// save the changes and launch SplashScreen to initialize
// the app again
// pref.setGoogleUsername(googleUsername);
pref.setNoOfGridCircles(Integer.parseInt(no_of_columns));
// pref.setCheckBox(val);
// pref.setGalleryName(galleryName);
// start the app from SplashScreen
Intent i = new Intent(MyPreferencesActivity.this,
SetWallpaperActivity2.class);
// Clear all the previous activities
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK| Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(i);
} else {
// user not modified any values in the form
// skip saving to shared preferences
// just go back to previous activity
onBackPressed();
}
}
}
});
}
public boolean isInteger(String input) {
try {
Integer.parseInt(input);
return true;
} catch (Exception e) {
return false;
}
}
private void savePreferences(String key, boolean value){
//SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences sharedPreferences = getSharedPreferences(PREF_NAME,0);
Editor editor = sharedPreferences.edit();
editor.putBoolean(key, value);
editor.commit();
}
}
我的wallpaperService类
package de.vogella.android.wallpaper;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.animation.AnimatorSet.Builder;
import android.app.ActionBar.LayoutParams;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.net.Uri;
import android.os.Handler;
import android.preference.PreferenceManager;
import android.service.wallpaper.WallpaperService;
import android.text.method.LinkMovementMethod;
import android.util.Log;
import android.view.ContextThemeWrapper;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class MyWallpaperService extends WallpaperService {
private final String TAG = getClass().getSimpleName();
private static final String PREF_NAME = "wallpaper";
//private PrefManager pref = new PrefManager(getApplicationContext());
@Override
public Engine onCreateEngine() {
Log.i( TAG, "onCreateEngine" );
return new MyWallpaperEngine();
}
private class MyWallpaperEngine<YourActivity> extends Engine {
private final Handler handler = new Handler();
private final Runnable drawRunner = new Runnable() {
@Override
public void run() {
draw();
}
};
private List<MyPoint> circles;
private Paint paint = new Paint();
Bitmap image = null;
private int width;
int height;
private boolean visible = true;
private int maxNumber;
private int maxNumber2;
private boolean touchEnabled;
private boolean touchEnabled2;
SharedPreferences prefs = null;
int fatchDataSize = 10;
ProdAdDetails []prodobj = new ProdAdDetails[fatchDataSize];
HashMap<Integer,String> map = new HashMap<Integer,String>();
Canvas canvas = null;
public MyWallpaperEngine()
{
pref= new PrefManager(getApplicationContext());
//prefs=PreferenceManager.getDefaultSharedPreferences(MyWallpaperService.this);
prefs = getSharedPreferences(PREF_NAME,0);
touchEnabled = prefs.getBoolean("Box",false);
}
@Override
public void onVisibilityChanged(boolean visible) {
this.visible = visible;
if (visible) {
handler.post(drawRunner);
} else {
handler.removeCallbacks(drawRunner);
}
}
public void onSurfaceDestroyed(SurfaceHolder holder) {
super.onSurfaceDestroyed(holder);
this.visible = true;
handler.removeCallbacks(drawRunner);
}
@Override
public void onSurfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
this.width = width;
this.height = height;
super.onSurfaceChanged(holder, format, width, height);
}
@Override
public void onTouchEvent(MotionEvent event) {
if (touchEnabled) {
if (event.getAction() == MotionEvent.ACTION_MOVE )
{
Toast.makeText(getApplicationContext(), "Move", Toast.LENGTH_SHORT).show();
}
else
if (event.getAction() == MotionEvent.ACTION_DOWN)
{
Toast.makeText(getApplicationContext(), "Down", Toast.LENGTH_SHORT).show();
}
super.onTouchEvent(event);
} // if block end
}
private void draw() {
SurfaceHolder holder = getSurfaceHolder();
//Canvas canvas = null;
try {
canvas = holder.lockCanvas();
if (canvas != null) {
if (circles.size() >= maxNumber2) {
circles.clear();
map = new HashMap<Integer,String>();
}
int x = (int) (width * Math.random());
int y = (int) (height * Math.random());
circles.add(new MyPoint(null, String.valueOf(circles.size() + 1), x, y));
drawCircles(canvas, circles);
}
} finally {
if (canvas != null)
holder.unlockCanvasAndPost(canvas);
}
handler.removeCallbacks(drawRunner);
if (visible) {
handler.postDelayed(drawRunner, 10000);
}
}
// Surface view requires that all elements are drawn completely
private void drawCircles(Canvas canvas, List<MyPoint> circles) {
canvas.drawColor(Color.LTGRAY);
int i=0;
for (MyPoint point : circles) {
//-------------------------------
paint.setTextSize(20);
paint.setStrikeThruText(true);
image = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
canvas.drawBitmap(image, point.x, point.y, null);
//touchEnabled = ((SharedPreferences) paint).getBoolean("touch", true);
//=====================================
ProdAdDetails pad = prodobj[i];//(ProdAdDetails)point.prodobj;
String prodName = pad.getProd_name();
String prodDtl = pad.getProd_details();
String prodCompName = pad.getProd_comp_name();
String prodPrice = pad.getProd_price();
final String prodDtls = prodDtl+"\nCompany :"+prodCompName+"\nRate :"+prodPrice+"%";
canvas.drawText(prodName, point.x+1, point.y+1, paint);
canvas.drawBitmap(image, point.x, point.y, null);
int key = point.x;
System.out.println("put:::"+key);
map.put(key, prodDtls);
//-------------------------------
//canvas.drawPaint(paint);
//Circle(point.x, point.y, 40.0f, paint);
//Toast.makeText(getApplicationContext(), prodDtls, Toast.LENGTH_SHORT).show();
i++;
}
}
}
}
我已经发布了我的代码，任何建议或建议都会有所帮助，因为我无法理解我哪里出错了。
答案 0 :(得分：0)
public static String KEY="Box";
private void savePreferences(boolean value){
SharedPreferences sharedpreferences = getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
Editor editor = sharedpreferences.edit();
editor.putBoolean(KEY,value);
editor.commit();
}
检索结束
SharedPreferences getpreferences = getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
boolean isChecked=getpreferences.getBoolean("Box",false);