Kotlin : packageManager.getLaunchIntentForPackage()不能启动应用程序

Question

我有这样的kotlin应用程序：

package com.test.openchrome

import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.widget.Button
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val launcher = findViewById<Button>(R.id.openchrome)
        launcher.setOnClickListener{
            var launchIntent: Intent? = null
            try {
                launchIntent = packageManager.getLaunchIntentForPackage("com.android.chrome")
            } catch (ignored: Exception) {
            }

            if (launchIntent == null) {
                startActivity(Intent(Intent.ACTION_VIEW).setData(Uri.parse("https://play.google.com/store/apps/details?id=" + "com.android.chrome")))
            } else {
                startActivity(launchIntent)
            }
        }
    }
}

我已经在我的android上安装了铬。

但是当我按下“打开铬”按钮时，铬就不会打开了。相反，切换到playstore。

Answer 1

尝尝这个

try {
 launchIntent =packageManager.getLaunchIntentForPackage("com.android.chrome")
 startActivity(launchIntent)
} catch (E: Exception) {
  println("Package not found")
}