I wrote a simple widget code. The button "Add TextView" creates TextView N1, N2, N3, the button "Set text in TextView N2" should change the text in TextView N2. How to change text in TextView N2 or get ID TextView N2?
MainActivity.java
package ru.test.widget;
import android.appwidget.AppWidgetManager;
import android.content.ComponentName;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RemoteViews;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button addTextView = findViewById(R.id.buttonAddTextView);
addTextView.setOnClickListener(this);
Button setText = findViewById(R.id.buttonSetText);
setText.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.buttonAddTextView:
addTextView();
break;
case R.id.buttonSetText:
setText();
break;
}
}
private void addTextView() {
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this);
ComponentName thisWidget = new ComponentName(this, AppWidget.class);
int[] appWidgetId = appWidgetManager.getAppWidgetIds(thisWidget);
RemoteViews views = new RemoteViews(this.getPackageName(), R.layout.app_widget);
for (int i = 0; i < 3; i++) {
RemoteViews textView = new RemoteViews(getPackageName(), R.layout.text_view_layout);
textView.setTextViewText(R.id.textView1, "TextView number " + String.valueOf(i));
views.addView(R.id.appWidgetLinearLayout, textView);
}
appWidgetManager.updateAppWidget(appWidgetId, views);
}
private void setText() {
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this);
ComponentName thisWidget = new ComponentName(this, AppWidget.class);
int[] appWidgetId = appWidgetManager.getAppWidgetIds(thisWidget);
RemoteViews views = new RemoteViews(this.getPackageName(), R.layout.app_widget);
views.setTextViewText(R.id.textView1, "Text !!!!");
appWidgetManager.updateAppWidget(appWidgetId, views);
}
}
AppWidget.java
package ru.test.widget;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.widget.RemoteViews;
/**
* Implementation of App Widget functionality.
*/
public class AppWidget extends AppWidgetProvider {
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
CharSequence widgetText = context.getString(R.string.appwidget_text);
// Construct the RemoteViews object
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.app_widget);
views.setTextViewText(R.id.appWidgetText, widgetText);
// Instruct the widget manager to update the widget
appWidgetManager.updateAppWidget(appWidgetId, views);
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// There may be multiple widgets active, so update all of them
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
@Override
public void onEnabled(Context context) {
// Enter relevant functionality for when the first widget is created
}
@Override
public void onDisabled(Context context) {
// Enter relevant functionality for when the last widget is disabled
}
}
MainActivity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<Button
android:id="@+id/buttonAddTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add TextView" />
<Button
android:id="@+id/buttonSetText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Set text in new TextView N2" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>
app_widget_info.xml
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:initialKeyguardLayout="@layout/app_widget"
android:initialLayout="@layout/app_widget"
android:minWidth="40dp"
android:minHeight="40dp"
android:previewImage="@drawable/example_appwidget_preview"
android:resizeMode="horizontal|vertical"
android:updatePeriodMillis="86400000"
android:widgetCategory="home_screen"></appwidget-provider>
app_widget.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#09C"
android:padding="@dimen/widget_margin">
<LinearLayout
android:id="@+id/appWidgetLinearLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/appWidgetText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_margin="8dp"
android:background="#000000"
android:text="@string/appwidget_text"
android:textColor="#ffffff"
android:textSize="8sp"/>
</LinearLayout>
</RelativeLayout>
text_view_layout.xml
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_margin="8dp"
android:text="TextView"
android:background="#7E2E2E"
android:textColor="#ffffff"
android:textSize="8sp"/>
