Android Seekbar要保存进度吗
我正在使用搜索栏,我想保存用户在seekbar中所做的更改&下次他打开应用程序时,应该显示这些更改。我的代码是Android Seekbar要保存进度吗,android,Android,我正在使用搜索栏,我想保存用户在seekbar中所做的更改&下次他打开应用程序时,应该显示这些更改。我的代码是 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); start=-10; //you need to give starting va
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
start=-10; //you need to give starting value of SeekBar
end=10; //you need to give end value of SeekBar
start_pos=5; //you need to give starting position value of SeekBar
start_position=(int) (((start_pos-start)/(end-start))*100);
discrete=start_pos;
SeekBar seek=(SeekBar) findViewById(R.id.seekBar1);
seek.setProgress(start_position);
seek.setOnSeekBarChangeListener(new OnSeekBarChangeListener(){
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(), "discrete = "+String.valueOf(discrete), Toast.LENGTH_SHORT).show();
}
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {
// TODO Auto-generated method stub
// To convert it as discrete value
float temp=progress;
float dis=end-start;
discrete=(start+((temp/100)*dis));
}
});
}
}
在onPause中将seekbar进度保存到共享首选项,并在onResume中将seekbar进度从共享首选项设置到共享首选项检查此项,并尝试了解如何在首选项中保存数据。 然后在你的活动中
@Override
protected void onPause() {
super.onPause();
// save seekBarPgrogress to preference here.
}
@Override
protected void onResume() {
super.onResume();
// load seekBarPgrogress from preference here.
// and call seek.setProgress(position);
}
希望能有所帮助