i want change tablelayout tablerow backgroundcolor when user click tablerow self.androiddev Submitted 19 minutes ago by mycall1004 MainActivity.java package com.example.abc.button_click_resize; import android.graphics.Color; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.TableRow; public class MainActivity extends AppCompatActivity { TableRow tr = (TableRow)findViewById(R.id.first_row);

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);

tr.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View arg0) {

        tr.setBackgroundColor(Color.GREEN);
    }

});

} } activity_main.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 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"

tools:context="com.example.abc.button_click_resize.MainActivity">

<TableLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:stretchColumns="2"> <TableRow android:id="@+id/first_row"> </TableRow> </TableLayout> </RelativeLayout> AndroidManifest.xml <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.abc.button_click_resize">

<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="button_click_resize" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

</application> </manifest> where should i edit? can you give me edited code? thanks for reading. have a nice day.