- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 4047
In order to have responsive UI use AsyncTask.
Here is one example.
content_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.stanko.myapplication.MainActivity"
tools:showIn="@layout/activity_main">
<EditText
android:id="@+id/myCounter"
android:layout_width="match_parent"
android:layout_height="1200px"
/>
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/myCounter"
android:text="Start"
android:onClick="startCounter"/>
</RelativeLayout>
MainActivity.java:
public class fillEdit extends AsyncTask<Void, String, String> {
@Override
protected String doInBackground(Void... params) {
for (Integer i=0; i<10000; i++) {
try {
Thread.currentThread().sleep(60);
} catch (InterruptedException e) {
e.printStackTrace();
}
publishProgress(i.toString());
}
return null;
}
@Override
protected void onProgressUpdate (String... result) {
EditText myCounter = (EditText) findViewById(R.id.myCounter);
myCounter.append(result[0]);
myCounter.append("\n");
}
}
public void startCounter (View view) {
new fillEdit().execute();
}
Here note:
try {
Thread.currentThread().sleep(60);
} catch (InterruptedException e) {
e.printStackTrace();
}
I needed to slow down code execution to make UI responsive, I also needed try / catch block because otherwise I would receive error:
Error:(51, 49) error: unreported exception InterruptedException; must be caught or declared to be thrown
Also, note how I am adding new line:
myCounter.append("\n");
- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 3685
<Button android:id="@+id/firstOne" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="First one" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginTop="53dp" /> <Button android:id="@+id/secondOne" android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_below="@+id/firstOne" android:text="Second one" />
Notice line:
android:layout_below="@+id/firstOne"
- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 3807
Example of button aligned to bottom of page:
<Button android:id="@+id/clickMe" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:text="Click me" />
Note line:
android:layout_alignParentBottom="true"
- Details
- Written by: Stanko Milosev
- Category: Android
- Hits: 3920
When you start new Android project, with SDK version 23, you will notice e-mail icon, like on picture:
Open activity_main.xml, in my case it is located in app\src\main\res\layout\activity_main.xml, and delete code:
<android.support.design.widget.FloatingActionButton android:id="@+id/fab" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom|end" android:layout_margin="@dimen/fab_margin" android:src="@android:drawable/ic_dialog_email" />
Then in MainActivity.java, in my case it is located in app\src\main\java\com\example\smi\myapplication\MainActivity.java delete code:
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});