Question

我正在使用viewpager（带有图片），在viewpager中，我设置了共享首选项，例如当用户启动活动时，他可以在退出活动时看到最后看到的页面...

viewpager的共享引用对我来说很好。我正在使用搜索栏在viewpager中滑动图像，但我如何使用相同的共享偏好在搜索栏中将搜索栏的位置更新到最后看到的页面或点。或者如果用户滑动viewpager上的图像，我如何自动更新搜索栏的进度。我是android领域的新手，这是我的第一篇帖子..请有人帮帮我..

我的代码：

public static ViewPager viewPager;
Customswipeadapter adapter;
public  static int  a;
public static int idName;
private SeekBar seekBar;




@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.viewpager);
    adapter = new Customswipeadapter(this);
    viewPager = (ViewPager) findViewById(R.id.viewpager);

    seekBar = (SeekBar) findViewById(R.id.seekBar);


    viewPager.setAdapter(adapter);
    viewPager.setPageTransformer(true, new RotateDownTransformer());
    viewPager.setCurrentItem(images_resources.length);
    a = viewPager.getCurrentItem();

    ////SHARED PREFERENCES///
    android.content.SharedPreferences prefs = getSharedPreferences("page_store", MODE_PRIVATE);
    idName = prefs.getInt("Page_number", 0); //0 is the default value.
    Toast.makeText(this, " Name"+idName , Toast.LENGTH_SHORT).show();
    if (idName != 0) {
        viewPager.setCurrentItem(idName);
        //Toast.makeText(viewpager.this,"Page no:"+ idName, Toast.LENGTH_LONG).show();
    } else {
        //Toast.makeText(this, "Null", Toast.LENGTH_SHORT).show();
    }

   //Seekbar start


    seekBar.setOnSeekBarChangeListener(
            new SeekBar.OnSeekBarChangeListener() {
                int progress = 0;
                @Override
                public void onProgressChanged(SeekBar seekBar,
                                              int progresValue, boolean fromUser) {
                   progress = images_resources.length-progresValue;
                    viewPager.setCurrentItem(progress);

                }

                @Override
                public void onStartTrackingTouch(SeekBar seekBar) {
                    // Do something here,
                    //if you want to do anything at the start of
                    // touching the seekbar
                    progress = seekBar.getProgress();

                }

                @Override
                public void onStopTrackingTouch(SeekBar seekBar) {
                    // Display the value in textview
                    //textView.setText(progress + "/" + seekBar.getMax());

                }
            });
}



@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu;
    //this adds items to the action bar if it is present.
   // getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}  ///Seekbar End


    //BACK PRESS METHOD
@Override
public void onBackPressed() {
    a = viewPager.getCurrentItem();
    SharedPreferences.Editor editor = getSharedPreferences("page_store", MODE_PRIVATE).edit();
    editor.putInt("Page_number", a);
    //Toast.makeText(this, " "+a , Toast.LENGTH_SHORT).show();
    editor.commit();
    finish();
}
//END OF SHARED PREFERENCES

}

Answer 1

您可以向viewPager添加addOnPageChangeListener并在onPageSelected中实现他的方法，您可以在％中设置搜索栏的进度。

viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }

        @Override
        public void onPageSelected(int position) {

            seekbar.setProgress((position * 100)/viewPager.getChildCount());

        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });

Seekbar共享首选项

1 个答案: