URL 仍然使用 webView 打开，即使使用 android 自定义选项卡启动

Question

I'm pretty new to Android development and building a simple demo app to try out the Android custom tabs functionality. Yet somehow when I launched the app and tested it on the virtual device, I still see the URL is launched with webView instead of custom tabs. Am I missing something? Thanks so much!

*the reason I'm trying is to bypass the facebook/Google login restriction nowadays on webview

my build.gradle :

plugins {
    id 'com.android.application'
}

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.0"

    defaultConfig {
        applicationId "com.example.helloworld"
        minSdkVersion 16
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.material:material:1.2.1'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
    implementation "androidx.browser:browser:1.3.0"
}

My MainActivity.java:

package com.example.helloworld;

import android.content.Intent;
import android.net.Uri;
import android.view.View;
import android.widget.Button;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import androidx.browser.customtabs.CustomTabsIntent;

public class MainActivity extends AppCompatActivity {

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

        Button loginBtn = findViewById(R.id.login);
        loginBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String loginUrl = "https://google.com";

                CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
                CustomTabsIntent customTabsIntent = builder.build();
                customTabsIntent.intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                customTabsIntent.launchUrl(getApplicationContext(), Uri.parse(loginUrl));
            }
        });

    }
}

Answer 1

Use PackageManager to check the device' s browser in code. https://developer.chrome.com/docs/android/custom-tabs/integration-guide/

Answer 2

User needs to have a browser app installed. Most browsers these days do support CustomTabs.

If there is not browser installed or the installed browser does not support CustomTabs, CustomTabs opens the URL in WebView.