Question

我在创建一个带有复选框的对话框。这个复选框如果选中则会在下次打开应用程序时显示对话框..我已经在共享偏好中保存了复选框状态，它会显示我是否选中了复选框，但对话框仍然在启动时打开..怎么了？

修改

//对话框查看checkBoxView = View.inflate（this，R.layout.checkbox，null）; CheckBox checkBox =（CheckBox）checkBoxView.findViewById（R.id.checkbox）; checkBox.setChecked（getFromSP（ “复选框”））;

checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

private void saveInSp(String key,boolean value){
    SharedPreferences preferences = getApplicationContext().getSharedPreferences("PROJECT_NAME", android.content.Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = preferences.edit();
    editor.putBoolean(key, value);
    editor.commit();
}
    @Override
    public void onCheckedChanged(CompoundButton buttonView,
            boolean isChecked) {
        // TODO Auto-generated method stub
        switch(buttonView.getId()){
        case R.id.checkbox:
        saveInSp("checkBox",isChecked);

        break;
        }
    }
}); 
checkBox.setText("Never show it");

SharedPreferences preferences = getApplicationContext().getSharedPreferences("PROJECT_NAME", android.content.Context.MODE_PRIVATE);

boolean hasBeenChecked = preferences.getBoolean("checkbox", false);

if (!hasBeenChecked) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle(" TITLE");
    builder.setMessage(" blablabla ")
           .setView(checkBoxView)
           .setCancelable(false)

           .setNeutralButton("Ok", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                    dialog.cancel();
               }
           }).show();

    }

Answer 1

在调用AlertDialog.show（）之前，您必须检查保存的值是否为共享首选项。

示例：

AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle(" TITLEs");
            builder.setMessage(" blablabla ")
                   .setView(checkBoxView)
                   .setCancelable(false)

                   .setNeutralButton("Ok", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface dialog, int id) {
                            dialog.cancel();
                       }
                   }).show();

AlertDialog dialog = builder.create();

if (getFromSP("checkBox")) {
   dialog.show();
}

Answer 2

我会：

（非必要）从匿名saveInSp中删除OnCheckedChangeListener并将其添加到活动中，例如
（非必要）您可以通过引用saveInSp

MyActivity.this.saveInSp

然后，在初始化并显示警报之前......

SharedPreferences preferences = getApplicationContext().getSharedPreferences("PROJECT_NAME", android.content.Context.MODE_PRIVATE);

boolean hasBeenChecked = preferences.getBoolean("checkBox", false);

if (!hasBeenChecked) {

AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle(" TITLEs");
    builder.setMessage(" blablabla ")
           .setView(checkBoxView)
           .setCancelable(false)

           .setNeutralButton("Ok", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                    dialog.cancel();
               }
           }).show();
}

选中后仅显示一次对话框复选框

2 个答案: