android：如何使用string []填充微调框，string []是已安装软件包的列表？

Question

 final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
    mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
    final List pkgAppsList = this.getPackageManager().queryIntentActivities( mainIntent, 0);
    final String[] apps = (String[]) pkgAppsList.toArray();
    Spinner appSpinner = (Spinner) findViewById(R.id.spinner1);
    ArrayAdapter<CharSequence> appAdapter = new ArrayAdapter(this, apps, android.R.layout.simple_spinner_item);
    appAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    appSpinner.setAdapter(cloudAdapter);

The previous code is throwing out errors for me in eclipse. I understand how to get the list of installed apps, and I understand how to populate a spinner using the createFromResource method. However I've never attempted to do so in this manner? Anyone able to direct me in the right direction?

Answer 1

Eventough it is late, you should use this constructor of ArrayAdapter instead :

ArrayAdapter<String> appAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, apps);
appAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
appSpinner.setAdapter(appAdapter);

Answer 2

Create a file named arrays.xml inside values folder.

Inside that give:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="array_name">
        <item>value1</item>
        <item>value2</item>
    </string-array>
</resources>

Then inside your spinner,give:

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.array_name, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
spinner.setAdapter(adapter);

Hope this may work for you.

Answer 3

检查： 如何获取已安装的android应用程序列表并选择一个以运行