使用共享preference保存切换状态 [英] Save the toggle state using share preference
本文介绍了使用共享preference保存切换状态的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我尝试保存我的application.Here切换状态是我的code
布尔上;
公众共享preferences US preF;
切换按钮TB;@覆盖
保护无效的onCreate(捆绑savedInstanceState){
// TODO自动生成方法存根
super.onCreate(savedInstanceState);
的setContentView(R.layout.fb_intermidiate);
US preF = GET preferences(MODE_PRIVATE);
TB =(切换按钮)findViewById(R.id.toggleButton1);
关于= S pref.getBoolean(开,真正的); //默认为true
如果(在= TRUE)
{
tb.setChecked(真);
}其他
{
tb.setChecked(假);
}
回到=(按钮)findViewById(R.id.button_back);
//back.setText(R.string.back_button_in_settings);
back.setOnClickListener(新View.OnClickListener(){ 公共无效的onClick(视图v){
// TODO自动生成方法存根
完();
}
});
}公共无效onToggleClicked(查看视图){ 关于=((切换按钮)视图).isChecked();
如果(上){
Toast.makeText(这一点,:通知将启用,Toast.LENGTH_SHORT).show();
共享preferences.Editor编辑= S pref.edit();
editor.putBoolean(开,真正的); //值存储
editor.commit(); }其他{
Toast.makeText(这一点,关:通知将被禁用,Toast.LENGTH_SHORT).show();
共享preferences.Editor编辑= S pref.edit();
editor.putBoolean(关,FALSE); //值存储
editor.commit();
}
}
但它越来越接近力:(
下面是我的logcat
九月七日至25日:02:23.317:E / AndroidRuntime(640):了java.lang.RuntimeException:无法启动活动ComponentInfo {com.ace.gugulog / com.ace。 gugulog.activities.FacebookIntermidiate}:显示java.lang.NullPointerException九月7日至25日:02:23.317:E / AndroidRuntime(640):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1815)九月7日至25日:02:23.317:E / AndroidRuntime(640):在java.lang.reflect.Method.invokeNative(本机方法)九月7日至25日:02:23.317:E / AndroidRuntime(640):在java.lang.reflect.Method.invoke(Method.java:491)九月7日至25日:02:23.317:E / AndroidRuntime(640):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)九月7日至25日:02:23.317:E / AndroidRuntime(640):在dalvik.system.NativeStart.main(本机方法)
九月7日至25日:02:23.317:E / AndroidRuntime(640):致:显示java.lang.NullPointerException九月7日至25日:02:23.317:E / AndroidRuntime(640):在com.ace.gugulog.activities.FacebookIntermidiate.onCreate(FacebookIntermidiate.java:32)九月7日至25日:02:23.317:E / AndroidRuntime(640):在android.app.Activity.performCreate(Activity.java:4397)九月7日至25日:02:23.317:E / AndroidRuntime(640):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
解决方案
我认为错误的最可能的来源是,你是不是使用共享preferencces得当,改变你的code到:你应该使用getShared preferences而不是GET preferences方法。
布尔上;
公众共享preferences US preF;
最后弦乐preF_NAME =preferences
切换按钮TB;@覆盖
保护无效的onCreate(捆绑savedInstanceState){
// TODO自动生成方法存根
super.onCreate(savedInstanceState);
的setContentView(R.layout.fb_intermidiate);
US preF = getShared preferences(preF_NAME,MODE_PRIVATE);
TB =(切换按钮)findViewById(R.id.toggleButton1);
关于= S pref.getBoolean(开,真正的); //默认为true
如果(在= TRUE)
{
tb.setChecked(真);
}其他
{
tb.setChecked(假);
}
回到=(按钮)findViewById(R.id.button_back);
//back.setText(R.string.back_button_in_settings);
back.setOnClickListener(新View.OnClickListener(){ 公共无效的onClick(视图v){
// TODO自动生成方法存根
完();
}
});
}公共无效onToggleClicked(查看视图){ 关于=((切换按钮)视图).isChecked();
如果(上){
Toast.makeText(这一点,:通知将启用,Toast.LENGTH_SHORT).show();
共享preferences.Editor编辑= S pref.edit();
editor.putBoolean(开,真正的); //值存储
editor.commit(); }其他{
Toast.makeText(这一点,关:通知将被禁用,Toast.LENGTH_SHORT).show();
共享preferences.Editor编辑= S pref.edit();
editor.putBoolean(关,FALSE); //值存储
editor.commit();
}
}
I try to save the toggle state in my application.Here is my code
boolean on;
public SharedPreferences spref;
ToggleButton tb;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.fb_intermidiate);
spref = getPreferences(MODE_PRIVATE);
tb = (ToggleButton) findViewById(R.id.toggleButton1);
on = spref.getBoolean("On", true); //default is true
if (on = true)
{
tb.setChecked(true);
} else
{
tb.setChecked(false);
}
back = (Button)findViewById(R.id.button_back);
//back.setText(R.string.back_button_in_settings);
back.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
}
public void onToggleClicked(View view) {
on = ((ToggleButton) view).isChecked();
if (on) {
Toast.makeText(this, "On : Notification will be Enabled", Toast.LENGTH_SHORT).show();
SharedPreferences.Editor editor = spref.edit();
editor.putBoolean("On", true); // value to store
editor.commit();
} else {
Toast.makeText(this, "Off : Notification will be Disabled", Toast.LENGTH_SHORT).show();
SharedPreferences.Editor editor =spref.edit();
editor.putBoolean("Off", false); // value to store
editor.commit();
}
}
But Its getting force close.:(
Here is my logcat
07-25 09:02:23.317: E/AndroidRuntime(640): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ace.gugulog/com.ace.gugulog.activities.FacebookIntermidiate}: java.lang.NullPointerException
07-25 09:02:23.317: E/AndroidRuntime(640): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1815)
07-25 09:02:23.317: E/AndroidRuntime(640): at java.lang.reflect.Method.invokeNative(Native Method)
07-25 09:02:23.317: E/AndroidRuntime(640): at java.lang.reflect.Method.invoke(Method.java:491)
07-25 09:02:23.317: E/AndroidRuntime(640): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
07-25 09:02:23.317: E/AndroidRuntime(640): at dalvik.system.NativeStart.main(Native Method)
07-25 09:02:23.317: E/AndroidRuntime(640): Caused by: java.lang.NullPointerException
07-25 09:02:23.317: E/AndroidRuntime(640): at com.ace.gugulog.activities.FacebookIntermidiate.onCreate(FacebookIntermidiate.java:32)
07-25 09:02:23.317: E/AndroidRuntime(640): at android.app.Activity.performCreate(Activity.java:4397)
07-25 09:02:23.317: E/AndroidRuntime(640): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
解决方案
I think most likely source of error is, you are not using shared preferencces properly, change your code to: you should use getSharedPreferences instead of getPreferences method.
boolean on;
public SharedPreferences spref;
final String PREF_NAME="preferences";
ToggleButton tb;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.fb_intermidiate);
spref = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
tb = (ToggleButton) findViewById(R.id.toggleButton1);
on = spref.getBoolean("On", true); //default is true
if (on = true)
{
tb.setChecked(true);
} else
{
tb.setChecked(false);
}
back = (Button)findViewById(R.id.button_back);
//back.setText(R.string.back_button_in_settings);
back.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
}
public void onToggleClicked(View view) {
on = ((ToggleButton) view).isChecked();
if (on) {
Toast.makeText(this, "On : Notification will be Enabled", Toast.LENGTH_SHORT).show();
SharedPreferences.Editor editor = spref.edit();
editor.putBoolean("On", true); // value to store
editor.commit();
} else {
Toast.makeText(this, "Off : Notification will be Disabled", Toast.LENGTH_SHORT).show();
SharedPreferences.Editor editor =spref.edit();
editor.putBoolean("Off", false); // value to store
editor.commit();
}
}
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