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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
package com.example.qml_in_java_based_android_project;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.SwitchCompat;
import android.content.res.Configuration;
import android.graphics.Color;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.TextView;
import org.qtproject.qt.android.QtQuickView;
import java.util.HashMap;
import java.util.Map;
// Implement QtQuickView StatusChangeListener interface to get status updates
// from the underlying QQuickView
public class MainActivity extends AppCompatActivity implements QtQuickView.StatusChangeListener {
private static final String TAG = "myTag";
private final Colors m_colors = new Colors();
private final Map<Integer, String> m_statusNames = new HashMap<Integer, String>() {{
put(QtQuickView.STATUS_READY, " READY");
put(QtQuickView.STATUS_LOADING, " LOADING");
put(QtQuickView.STATUS_ERROR, " ERROR");
put(QtQuickView.STATUS_NULL, " NULL");
}};
private int m_qmlButtonSignalListenerId;
private LinearLayout m_mainLinear;
private FrameLayout m_qmlFrameLayout;
private QtQuickView m_qmlView;
private LinearLayout m_androidControlsLayout;
private TextView m_getPropertyValueText;
private TextView m_qmlStatus;
private SwitchCompat m_switch;
private View m_box;
//! [onCreate]
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
m_mainLinear = findViewById(R.id.mainLinear);
m_getPropertyValueText = findViewById(R.id.getPropertyValueText);
m_qmlStatus = findViewById(R.id.qmlStatus);
m_androidControlsLayout = findViewById(R.id.javaLinear);
m_box = findViewById(R.id.box);
m_switch = findViewById(R.id.switch1);
m_switch.setOnClickListener(view -> switchListener());
//! [m_qmlView]
m_qmlView = new QtQuickView(this, "qrc:/qt/qml/qml_in_android_view/main.qml",
"qml_in_android_view");
//! [m_qmlView]
// Set status change listener for m_qmlView
// listener implemented below in OnStatusChanged
//! [setStatusChangeListener]
m_qmlView.setStatusChangeListener(this);
//! [setStatusChangeListener]
//! [layoutParams]
ViewGroup.LayoutParams params = new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
m_qmlFrameLayout = findViewById(R.id.qmlFrame);
m_qmlFrameLayout.addView(m_qmlView, params);
//! [layoutParams]
Button button = findViewById(R.id.button);
button.setOnClickListener(view -> onClickListener());
// Check target device orientation on launch
handleOrientationChanges();
}
//! [onCreate]
@Override
public void onConfigurationChanged(@NonNull Configuration newConfig) {
super.onConfigurationChanged(newConfig);
handleOrientationChanges();
}
private void handleOrientationChanges() {
// When specific target device display configurations (listed in AndroidManifest.xml
// android:configChanges) change, get display metrics and make needed changes to UI
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
ViewGroup.LayoutParams qmlFrameLayoutParams = m_qmlFrameLayout.getLayoutParams();
ViewGroup.LayoutParams linearLayoutParams = m_androidControlsLayout.getLayoutParams();
if (displayMetrics.heightPixels > displayMetrics.widthPixels) {
m_mainLinear.setOrientation(LinearLayout.VERTICAL);
qmlFrameLayoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT;
qmlFrameLayoutParams.height = 0;
linearLayoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT;
linearLayoutParams.height = 0;
} else {
m_mainLinear.setOrientation(LinearLayout.HORIZONTAL);
qmlFrameLayoutParams.width = 0;
qmlFrameLayoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT;
linearLayoutParams.width = 0;
linearLayoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT;
}
m_qmlFrameLayout.setLayoutParams(qmlFrameLayoutParams);
m_androidControlsLayout.setLayoutParams(linearLayoutParams);
}
//! [onStatusChanged]
@Override
public void onStatusChanged(int status) {
Log.i(TAG, "Status of QtQuickView: " + status);
final String qmlStatus = getResources().getString(R.string.qml_view_status)
+ m_statusNames.get(status);
// Show current QML View status in a textview
m_qmlStatus.setText(qmlStatus);
// Connect signal listener to "onClicked" signal from main.qml
// addSignalListener returns int which can be used later to identify the listener
//! [qml signal listener]
if (status == QtQuickView.STATUS_READY && !m_switch.isChecked()) {
m_qmlButtonSignalListenerId = m_qmlView.connectSignalListener("onClicked", Object.class,
(String signal, Object o) -> {
Log.i(TAG, "QML button clicked");
m_androidControlsLayout.setBackgroundColor(Color.parseColor(m_colors.getColor()));
});
}
//! [qml signal listener]
}
//! [onStatusChanged]
//! [onClickListener]
public void onClickListener() {
// Set the QML view root object property "colorStringFormat" value to
// color from Colors.getColor()
m_qmlView.setProperty("colorStringFormat", m_colors.getColor());
String qmlBackgroundColor = m_qmlView.getProperty("colorStringFormat");
// Display the QML View background color code
m_getPropertyValueText.setText(qmlBackgroundColor);
// Display the QML View background color in a view
m_box.setBackgroundColor(Color.parseColor(qmlBackgroundColor));
}
//! [onClickListener]
public void switchListener() {
TextView text = findViewById(R.id.switchText);
// Disconnect QML button signal listener if switch is On using the saved signal listener Id
// and connect it again if switch is turned off
if (m_switch.isChecked()) {
Log.i(TAG, "QML button onClicked signal listener disconnected");
text.setText(R.string.connect_qml_button_signal_listener);
//! [disconnect qml signal listener]
m_qmlView.disconnectSignalListener(m_qmlButtonSignalListenerId);
//! [disconnect qml signal listener]
} else {
Log.i(TAG, "QML button onClicked signal listener connected");
text.setText(R.string.disconnect_qml_button_signal_listener);
m_qmlButtonSignalListenerId = m_qmlView.connectSignalListener("onClicked",
Object.class, (String t, Object value) -> {
Log.i(TAG, "QML button clicked");
m_androidControlsLayout.setBackgroundColor(Color.parseColor(m_colors.getColor()));
});
}
}
}
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