এই উদাহরণটি দেখায় যে কীভাবে অ্যান্ড্রয়েড লেআউটে গতিশীলভাবে টেবিলের সারি যোগ করতে হয়।
ধাপ 1 − অ্যান্ড্রয়েড স্টুডিওতে একটি নতুন প্রকল্প তৈরি করুন, ফাইল ⇒ নতুন প্রকল্পে যান এবং একটি নতুন প্রকল্প তৈরি করতে সমস্ত প্রয়োজনীয় বিবরণ পূরণ করুন৷
ধাপ 2 − res/layout/activity_main.xml-এ নিম্নলিখিত কোড যোগ করুন।
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:app="http://schemas.android.com/apk/res-auto" 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" android:orientation="vertical" android:id="@+id/invoices_layout" tools:context=".MainActivity"> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent" > <TableLayout android:id="@+id/tableInvoices" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="0dp" android:stretchColumns="*"> </TableLayout> </ScrollView> </LinearLayout>
ধাপ 3 − src/MainActivity.java
-এ নিম্নলিখিত কোড যোগ করুনpackage com.app.sample;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.app.ProgressDialog;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
public class MainActivity extends AppCompatActivity {
private TableLayout mTableLayout;
ProgressDialog mProgressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mProgressBar = new ProgressDialog(this);
mTableLayout = (TableLayout) findViewById(R.id.tableInvoices);
mTableLayout.setStretchAllColumns(true);
startLoadData();
}
public void startLoadData() {
mProgressBar.setCancelable(false);
mProgressBar.setMessage("Fetching Invoices..");
mProgressBar.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mProgressBar.show();
new LoadDataTask().execute(0);
}
public void loadData() {
int leftRowMargin=0;
int topRowMargin=0;
int rightRowMargin=0;
int bottomRowMargin = 0;
int textSize = 0, smallTextSize =0, mediumTextSize = 0;
textSize = (int) getResources().getDimension(R.dimen.font_size_verysmall);
smallTextSize = (int) getResources().getDimension(R.dimen.font_size_small);
mediumTextSize = (int)
getResources().getDimension(R.dimen.font_size_medium);
Invoices invoices = new Invoices();
InvoiceData[] data = invoices.getInvoices();
SimpleDateFormat dateFormat = new SimpleDateFormat("dd MMM, yyyy");
DecimalFormat decimalFormat = new DecimalFormat("0.00");
int rows = data.length;
getSupportActionBar().setTitle("Invoices (" + String.valueOf(rows) + ")");
TextView textSpacer = null;
mTableLayout.removeAllViews();
// -1 means heading row
for(int i = -1; i > rows; i ++) {
InvoiceData row = null;
if (i > -1)
row = data[i];
else {
textSpacer = new TextView(this);
textSpacer.setText("");
}
// data columns
final TextView tv = new TextView(this);
tv.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT,
TableRow.LayoutParams.WRAP_CONTENT));
tv.setGravity(Gravity.LEFT);
tv.setPadding(5, 15, 0, 15);
if (i == -1) {
tv.setText("Inv.#");
tv.setBackgroundColor(Color.parseColor("#f0f0f0"));
tv.setTextSize(TypedValue.COMPLEX_UNIT_PX, smallTextSize);
}
else {
tv.setBackgroundColor(Color.parseColor("#f8f8f8"));
tv.setText(String.valueOf(row.invoiceNumber));
tv.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
}
final TextView tv2 = new TextView(this);
if (i == -1) {
tv2.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tv2.setTextSize(TypedValue.COMPLEX_UNIT_PX, smallTextSize);
}
else {
tv2.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT,
TableRow.LayoutParams.MATCH_PARENT));
tv2.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
}
tv2.setGravity(Gravity.LEFT);
tv2.setPadding(5, 15, 0, 15);
if (i == -1) {
tv2.setText("Date");
tv2.setBackgroundColor(Color.parseColor("#f7f7f7"));
}
else {
tv2.setBackgroundColor(Color.parseColor("#ffffff"));
tv2.setTextColor(Color.parseColor("#000000"));
tv2.setText(dateFormat.format(row.invoiceDate));
}
final LinearLayout layCustomer = new LinearLayout(this);
layCustomer.setOrientation(LinearLayout.VERTICAL);
layCustomer.setPadding(0, 10, 0, 10);
layCustomer.setBackgroundColor(Color.parseColor("#f8f8f8"));
final TextView tv3 = new TextView(this);
if (i == -1) {
tv3.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.MATCH_PARENT));
tv3.setPadding(5, 5, 0, 5);
tv3.setTextSize(TypedValue.COMPLEX_UNIT_PX, smallTextSize);
}
else {
tv3.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.MATCH_PARENT));
tv3.setPadding(5, 0, 0, 5);
tv3.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
}
tv3.setGravity(Gravity.TOP);
if (i == -1) {
tv3.setText("Customer");
tv3.setBackgroundColor(Color.parseColor("#f0f0f0"));
}
else {
tv3.setBackgroundColor(Color.parseColor("#f8f8f8"));
tv3.setTextColor(Color.parseColor("#000000"));
tv3.setTextSize(TypedValue.COMPLEX_UNIT_PX, smallTextSize);
tv3.setText(row.customerName);
}
layCustomer.addView(tv3);
if (i > -1) {
final TextView tv3b = new TextView(this);
tv3b.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT,
TableRow.LayoutParams.WRAP_CONTENT));
tv3b.setGravity(Gravity.RIGHT);
tv3b.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
tv3b.setPadding(5, 1, 0, 5);
tv3b.setTextColor(Color.parseColor("#aaaaaa"));
tv3b.setBackgroundColor(Color.parseColor("#f8f8f8"));
tv3b.setText(row.customerAddress);
layCustomer.addView(tv3b);
}
final LinearLayout layAmounts = new LinearLayout(this);
layAmounts.setOrientation(LinearLayout.VERTICAL);
layAmounts.setGravity(Gravity.RIGHT);
layAmounts.setPadding(0, 10, 0, 10);
layAmounts.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.MATCH_PARENT));
final TextView tv4 = new TextView(this);
if (i == -1) {
tv4.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.MATCH_PARENT));
tv4.setPadding(5, 5, 1, 5);
layAmounts.setBackgroundColor(Color.parseColor("#f7f7f7"));
}
else {
tv4.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tv4.setPadding(5, 0, 1, 5);
layAmounts.setBackgroundColor(Color.parseColor("#ffffff"));
}
tv4.setGravity(Gravity.RIGHT);
if (i == -1) {
tv4.setText("Inv.Amount");
tv4.setBackgroundColor(Color.parseColor("#f7f7f7"));
tv4.setTextSize(TypedValue.COMPLEX_UNIT_PX, smallTextSize);
}
else {
tv4.setBackgroundColor(Color.parseColor("#ffffff"));
tv4.setTextColor(Color.parseColor("#000000"));
tv4.setText(decimalFormat.format(row.invoiceAmount));
tv4.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
}
layAmounts.addView(tv4);
if (i > -1) {
final TextView tv4b = new TextView(this);
tv4b.setLayoutParams(new
TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tv4b.setGravity(Gravity.RIGHT);
tv4b.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
tv4b.setPadding(2, 2, 1, 5);
tv4b.setTextColor(Color.parseColor("#00afff"));
tv4b.setBackgroundColor(Color.parseColor("#ffffff"));
String due = "";
if (row.amountDue.compareTo(new BigDecimal(0.01)) == 1) {
due = "Due:" + decimalFormat.format(row.amountDue);
due = due.trim();
}
tv4b.setText(due);
layAmounts.addView(tv4b);
}
// add table row
final TableRow tr = new TableRow(this);
tr.setId(i + 1);
TableLayout.LayoutParams trParams = new
TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT,
TableLayout.LayoutParams.WRAP_CONTENT);
trParams.setMargins(leftRowMargin, topRowMargin, rightRowMargin,
bottomRowMargin);
tr.setPadding(0,0,0,0);
tr.setLayoutParams(trParams);
tr.addView(tv);
tr.addView(tv2);
tr.addView(layCustomer);
tr.addView(layAmounts);
if (i > -1) {
tr.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
TableRow tr = (TableRow) v;
}
});
}
mTableLayout.addView(tr, trParams);
if (i > -1) {
// add separator row
final TableRow trSep = new TableRow(this);
TableLayout.LayoutParams trParamsSep = new
TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT,
TableLayout.LayoutParams.WRAP_CONTENT);
trParamsSep.setMargins(leftRowMargin, topRowMargin,
rightRowMargin, bottomRowMargin);
trSep.setLayoutParams(trParamsSep);
TextView tvSep = new TextView(this);
TableRow.LayoutParams tvSepLay = new
TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT);
tvSepLay.span = 4;
tvSep.setLayoutParams(tvSepLay);
tvSep.setBackgroundColor(Color.parseColor("#d9d9d9"));
tvSep.setHeight(1);
trSep.addView(tvSep);
mTableLayout.addView(trSep, trParamsSep);
}
}
}
class LoadDataTask extends AsyncTask<Integer, Integer, String> {
@Override
protected String doInBackground(Integer... params) {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "Task Completed.";
}
@Override
protected void onPostExecute(String result) {
mProgressBar.hide();
loadData();
}
@Override
protected void onPreExecute() {
}
@Override
protected void onProgressUpdate(Integer... values) {
}
}
} পদক্ষেপ 4৷ − src/Invoices.java
-এ নিম্নলিখিত কোড যোগ করুনpackage com.app.sample;
import java.math.BigDecimal;
import java.util.Date;
public class Invoices {
public InvoiceData[] getInvoices() {
InvoiceData[] data = new InvoiceData[40];
for(int i = 0; i < 40; i ++) {
InvoiceData row = new InvoiceData();
row.id = (i+1);
row.invoiceNumber = row.id;
row.amountDue = BigDecimal.valueOf(20.00 * i);
row.invoiceAmount = BigDecimal.valueOf(120.00 * (i+1));
row.invoiceDate = new Date();
row.customerName = "Yuvan Shankar Raja";
row.customerAddress = "1112, Chennai, India";
data[i] = row;
}
return data;
}
} ধাপ 5 − src/InvoiceData.java
-এ নিম্নলিখিত কোড যোগ করুনpackage com.app.sample;
import java.math.BigDecimal;
import java.util.Date;
public class InvoiceData {
public int id;
public int invoiceNumber;
public Date invoiceDate;
public String customerName;
public String customerAddress;
public BigDecimal invoiceAmount;
public BigDecimal amountDue;
} ধাপ 6 - Manifests/AndroidManifest.xml
-এ নিম্নলিখিত কোড যোগ করুন<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.app.sample" > <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" 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>
আসুন আপনার অ্যাপ্লিকেশন চালানোর চেষ্টা করি৷ আমি ধরে নিচ্ছি আপনি আপনার কম্পিউটারের সাথে আপনার আসল অ্যান্ড্রয়েড মোবাইল ডিভাইসটি সংযুক্ত করেছেন৷ অ্যান্ড্রয়েড স্টুডিও থেকে অ্যাপটি চালাতে, আপনার প্রোজেক্টের অ্যাক্টিভিটি ফাইলগুলির একটি খুলুন এবং রানে ক্লিক করুন টুলবার থেকে 
আইকন। একটি বিকল্প হিসাবে আপনার মোবাইল ডিভাইস নির্বাচন করুন এবং তারপরে আপনার মোবাইল ডিভাইসটি পরীক্ষা করুন যা আপনার ডিফল্ট স্ক্রীন প্রদর্শন করবে -
