I faced a new problem. In my app, there is a part we called it X. The X part have 5 tab ( using Viewpager and ...) When user click on a button to start X activity, because, I must set text for all of the tabs (and there is 5 of them),there is a delay, based on the phone it's different, on low level phone its about, 4-7 second!!! so, what can i do to solve the problem? my way: 1- change my UI design and split the 5 tab into, 5 single activity. 2- use an progress bar( or something like progress bar) and don't change my design.( the problem is i don't know how to do this, i mean i don't know when all of the text are set)
what is the other solutions? So, if i want to use AsynckTask, the code would be like this right? Main:
public class Law_main extends AppCompatActivity {
FrameLayout fl_TEMP;
TextView btn_ASD;
ViewPager viewPager;
PagerAdapter adapter;
TabLayout tabLayout;
ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.law_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText("TAB 1"));
tabLayout.addTab(tabLayout.newTab().setText("TAB 2"));
tabLayout.addTab(tabLayout.newTab().setText("TAB 3"));
tabLayout.addTab(tabLayout.newTab().setText("TAB 4"));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
fl_TEMP = (FrameLayout) findViewById(R.id.TEMP);
btn_ASD = (TextView) findViewById(R.id.ASD);
new TxtTimer().execute();
final View appbar = findViewById(R.id.appbar);
viewPager = (ViewPager) findViewById(R.id.pager);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
private class TxtTimer extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(String... strings) {
return null;
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
adapter = new PagerAdapter(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.setCurrentItem(1, true);
progressBar.setVisibility(View.GONE);
}
}
}
this code act like this: When user Click on to open X activity, user stay in the activity and then after a while, when all text got set, the x activity is open, so it's not helping at all. Were am i wrong?
Depending on how you are retrieving your text, consider using an AsyncTask . You can also put a progress circle on the fragment whilst it is loading so that the app doesn't appear to have frozen.
基于 RobVoisey 所说的内容,并且不确切知道您的用例,我会首先加载第一个选项卡的文本,以便用户查看并同时使用AsyncTask加载其他选项卡的文本,同时在适当的位置和/或显示加载图形必要的。
在选项卡中使用片段并使用片段生命周期按需加载内容,您将在每个片段上加载 1/5 文本的起点。
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