Question

如何让这个切换按钮状态保存并在我使用共享首选项的所有活动中使用，我把共享首选项代码但是这个没有用，所以有些东西我错过了或者这段代码是错误的

这是新代码和全班代码请检查一下，也许会影响代码

public class CollectionPrayersTextActivity extends Activity {

    boolean on;
    public SharedPreferences tprefs;
    final String PREF_NAME="preferences";
    public static TextView textview;
    private SharedPreferences prefs;
    private SeekBar seekbar;
    private ToggleButton toggle;
    private LinearLayout linear;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // Remove title bar
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        // Remove notification bar
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
        Window window = getWindow();
        // Unlock the device if locked
        window.addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
        // Turn screen on if off
        window.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
        // Keep screen on
        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        // Transition between activities
        overridePendingTransition(R.anim.incoming, R.anim.outgoing);
        // On Create
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_collectionprayers_text);
        // Determine The Tools
        seekbar = (SeekBar)     findViewById(R.id.seekBarcollectionprayerstext);
        textview = (TextView)     findViewById(R.id.id_collectionprayers_txt);
        toggle = (ToggleButton) findViewById(R.id.toggleButton1);
        linear = (LinearLayout) findViewById(R.id.linear1);
        // Toogle Share Preferences

        SharedPreferences tprefs = getSharedPreferences("com.e_orthodoxy.orthodox_prayers", MODE_PRIVATE);
        toggle.setChecked(tprefs.getBoolean("On", true));
        // Get Extra From Another Activity
        Intent n = getIntent();
        String mrng = n.getStringExtra("key");
        textview.setText(Html.fromHtml(mrng));
        // SeekBar Preferences
        prefs = getPreferences(MODE_PRIVATE);
        float fs = prefs.getFloat("fontsize", 40);
        seekbar.setProgress((int) fs);
        textview.setTextSize(TypedValue.COMPLEX_UNIT_PX, seekbar.getProgress());
        // Programming SeekBar
        seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                prefs = getPreferences(MODE_PRIVATE);
                SharedPreferences.Editor ed = prefs.edit();
                ed.putFloat("fontsize", textview.getTextSize());
                ed.commit();
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress,
                boolean fromUser) {
                textview.setTextSize(TypedValue.COMPLEX_UNIT_PX, progress);
            }
        });
        // Programming ToggleButton
        toggle.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                if (toggle.isChecked()) {
                    textview.setTextColor(Color.WHITE);
                    linear.setBackgroundColor(Color.BLACK);
                    textview.setShadowLayer(0, 0, 0, Color.WHITE);
                    SharedPreferences.Editor editor =getSharedPreferences("com.e_orthodoxy.orthodox_prayers", MODE_PRIVATE).edit();
                    editor.putBoolean("On", true);
                    editor.commit();

                } else {

                    textview.setTextColor(Color.BLACK);
                    linear.setBackgroundColor(Color.WHITE);
                    textview.setShadowLayer(0, 0, 0, Color.BLACK);
                    SharedPreferences.Editor editor =getSharedPreferences("com.e_orthodoxy.orthodox_prayers", MODE_PRIVATE).edit();
                    editor.putBoolean("Off", false);
                    editor.commit();

                }
            }
        });
    }

    public void c_default(View V) {
        textview.setTextColor(getResources().getColor(R.color.Vanilla));
    linear.setBackgroundColor(getResources().getColor(R.color.Maroon));
        textview.setShadowLayer((float) 1.5, 2, 2, Color.BLACK);
    }

    @Override
    public void onBackPressed() {
        Intent intent_e3tiraf_back = new Intent(
            CollectionPrayersTextActivity.this,
            CollectionPrayersActivity.class);
        startActivity(intent_e3tiraf_back);
        finish();
    }
}

Answer 1

保存：

@Override
public void onClick(View v) 
{
    if (toggle.isChecked()) 
    {
        SharedPreferences.Editor editor = getSharedPreferences("com.example.xyz", MODE_PRIVATE).edit();
        editor.putBoolean("NameOfThingToSave", true);
        editor.commit();
    }
    else
    {
        SharedPreferences.Editor editor = getSharedPreferences("com.example.xyz", MODE_PRIVATE).edit();
        editor.putBoolean("NameOfThingToSave", false);
        editor.commit();
    }
}

加载：

@Override
protected void onCreate(Bundle savedInstanceState) 
{
    SharedPreferences sharedPrefs = getSharedPreferences("com.example.xyle", MODE_PRIVATE);
    toggle.setChecked(sharedPrefs.getBoolean("NameOfThingToSave", true));
}

SharedPreferences.Editor.putBoolean

SharedPreferences.Editor.getBoolean

如何使用共享首选项保存togglebutton状态

1 个答案: