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如何使用共享首选项保存此切换按钮状态并在我的所有 Activity 中使用，我放置了共享首选项代码，但这个代码不起作用，所以我错过了什么或此代码有问题
这是新代码和整个类代码，请检查它，也许有什么影响代码
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();
}
}