保存多个Seekbar共享引用

Question

我有一个"活动"，其中y有3个搜索栏，我在每个搜索栏的文本视图中看到每个搜索栏值。

现在，我想用sharedPreferences存储每个搜索栏的值。我试过几种方法，但都没能买到。

我已经读到，正确的方法是在调用onPause时保存值，并在调用onResume时恢复它们。

public class Configuration extends Activity implements OnSeekBarChangeListener {
    public TextView progress1;
    public TextView progress2;
    public TextView progress3;
    private SeekBar bar1;
    private SeekBar bar2;
    private SeekBar bar3;
    private int savedProgress1;
    private int savedProgress2;
    private int savedProgress3; 
    private int loadedProgress1;
    private int loadedProgress2;
    private int loadedProgress3;
    private String Key_PROGRESS_1 = "bar1_progress";
    private String Key_PROGRESS_2 = "bar2_progress";
    private String Key_PROGRESS_3 = "bar3_progress";
    SharedPreferences mPreferences;
    SharedPreferences.Editor editor;

    /*********************
     * 
     * ONCREATE
     * 
     ********************/

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.configuracion2);

        bar1 = (SeekBar)findViewById(R.id.fast_bar); //make seekbar object
        bar1.setOnSeekBarChangeListener(this);   //set seekbar listener 
        progress1 = (TextView)findViewById(R.id.salida1);
        bar2 = (SeekBar)findViewById(R.id.climb_bar);
        bar2.setOnSeekBarChangeListener(this);      
        progress2 = (TextView)findViewById(R.id.salida2);
        bar3 = (SeekBar)findViewById(R.id.platform_bar);
        bar3.setOnSeekBarChangeListener(this);      
        progress3 = (TextView)findViewById(R.id.salida3);

        mPreferences = PreferenceManager.getDefaultSharedPreferences(this);
        editor = mPreferences.edit();

    }

    public void onProgressChanged(SeekBar bar, int progress, boolean fromUser) {
        Log.v("", "" + bar);
        switch (bar.getId()) {  
            case R.id.fast_bar:
                progress1.setText(progress + "%");
                break;
            case R.id.climb_bar:
                progress2.setText(progress + "%");
                break;
            case R.id.platform_bar:
                progress3.setText(progress + "%");
                break;
        }
    }
    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {     
    }   
     @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        seekBar.setSecondaryProgress(seekBar.getProgress());    
    }


     protected void onResume() {    
         super.onResume();
             loadedProgress1 = mPreferences.getInt("Key_PROGRESS_1", 0);
             bar1.setProgress(loadedProgress1);         
             loadedProgress2 = mPreferences.getInt("Key_PROGRESS_2", 0);
             bar2.setProgress(loadedProgress2);
             loadedProgress2 = mPreferences.getInt("Key_PROGRESS_3", 0);
             bar3.setProgress(loadedProgress3);
     }


     protected void onPause(/*SeekBar seekBar*/) {
        super.onPause();
                savedProgress1 = bar1.getProgress();
                editor.putInt(Key_PROGRESS_1, savedProgress1);
                savedProgress2 = bar2.getProgress();
                editor.putInt(Key_PROGRESS_2, savedProgress2);
                savedProgress3 = bar3.getProgress();
                editor.putInt(Key_PROGRESS_3, savedProgress3);
                editor.commit();

     }
}

Answer 1

不要将同一个SharedPreferences.Editor对象作为私有成员。

在onPause():内调用mPreferences.edit()

SharedPreferences.Editor editor = mPreferences.edit();
savedProgress1 = bar1.getProgress();
editor.putInt(Key_PROGRESS_1, savedProgress1);
savedProgress2 = bar2.getProgress();
editor.putInt(Key_PROGRESS_2, savedProgress2);
savedProgress3 = bar3.getProgress();
editor.putInt(Key_PROGRESS_3, savedProgress3);
editor.commit();

---

此外，它也不起作用，因为在onResume()方法中使用了字符串"Key_PROGRESS_X"而不是变量Key_PROGRESS_X。