It’s very simple to add textviews and buttons to linear layout programmatically, just follow this steps. The fist step. Add a LinearLayout in .xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/activity_linear_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/thewordis"
android:orientation="horizontal"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin">
</LinearLayout>
Now in .class add:
1) add LinearLayout
2) add LayoutParams
3) add TextView
4) add Button
5) add the TextView and the Button to View
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class ClassTheDeveloperWorldIsYours extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.the_developer_world_is_yours);
//added LInearLayout
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.activity_linear_layout);
//added LayoutParams
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
linearLayout.setOrientation(LinearLayout.VERTICAL);
//add textView
TextView textView = new TextView(this);
textView.setText("The developer world is yours");
textView.setId(1);
textView.setLayoutParams(params);
// added Button
Button button = new Button(this);
button.setText("thedeveloperworldisyours");
button.setId(2);
//added the textView and the Button to LinearLayout
linearLayout.addView(textView);
linearLayout.addView(button);
}
}
You can download this code:
Thanks for the code sample.One question though. Shouldnt the widget Ids have unique numbers.
Yes
Thanks for this tutorial, simple, readable and helpfull. It is 3 days i decided to start learn Android and build my first app and half of today spend with searching for help what to do when I have part of ui in XML and part need to be generated by code. This tutorial solves it within 3 minutes, good work bro đŸ˜€
Thanks for your help. My simple problem is setContentView(), I set it in the end of the onCreate() procedure. So that, It took 2 days to solve.
txtview[i]= new TextView(Shownews.this);
txtview[i].setText(parseObjects.get(i).get(“NewsTitle”).toString());
txtview[i].setLayoutParams(params);
line[i]=new View(Shownews.this);
line[i].setBackgroundColor(argb(255,255,207,50));
line[i].setMinimumHeight(2);
layout1.addView(txtview[i]);
layout1.addView(line[i]);
for multiple views and textview
but showing error
I think that this way is strange. The best way is only view.
public class Shownews extends Activity {
public LinearLayout layout1;
public View line[];
public TextView txtview[];
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.shownews);
layout1 = (LinearLayout) findViewById(R.id.info1);
final LinearLayout.LayoutParams params;
params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
ParseQuery query = ParseQuery.getQuery(“UpdatedNews”);
query.findInBackground(new FindCallback()
{
// public void done(List scoreList, ParseException e) {
@Override
public void done(List parseObjects, com.parse.ParseException e)
{
if (e == null)
{
Log.d(“news——>”, String.valueOf(parseObjects.size()));
for (int i=0;i” + i, parseObjects.get(i).get(“NewsTitle”).toString());
}
}
else
{
Log.d(“score”, “Error: ” + e.getMessage());
}
}
});
}
}
error like as follows
02-16 17:40:09.097 29073-29073/com.dsstechnologies.janardanswami E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
at com.dsstechnologies.janardanswami.Shownews$1.done(Shownews.java:58)
at com.parse.FindCallback.internalDone(FindCallback.java:45)
at com.parse.FindCallback.internalDone(FindCallback.java:31)
at com.parse.Parse$4$1.run(Parse.java:792)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5162)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:756)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:572)
at miui.dexspy.DexspyInstaller.main(DexspyInstaller.java:171)
at dalvik.system.NativeStart.main(Native Method)
You have some varible in 58 line which is null, you must init variable.
How to get The Value that we already generate ? is there a way to get it ? using for or what ? please tell me I’m new
HI,
I have tired this code can this code add multiple text and buttons using on click listener.
Wow, u r wow, Cabezaz… I like everything I see…. your codes work perfectly!!