java - 无法解析方法 'isIntentAvailable(android.content.intent)'

Question

我正在学习 Udemy.com 上的一些教程，但遇到此语法错误“无法解析方法‘isIntentAvailable(android.content.intent)’我尝试在网上查找但找不到解决方案。它是否被弃用了？

提前致谢

   mPerformButton = (Button) findViewById(R.id.performImplicit);
    mPerformButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int position = mSpinner.getSelectedItemPosition();
            Intent implicitIntent = null;
            switch (position){

                case 0 :
                    //nothing selected
                    break;
                case 1:
                    //deltaprogram.us
                    implicitIntent = new Intent(Intent.ACTION_VIEW,
                            Uri.parse("http://deltaprogram.us"));
                    break;
                case 2:
                    //call someone
                    implicitIntent = new Intent(Intent.ACTION_DIAL,
                            Uri.parse("tel:(+000)8675309"));
                    break;
                case 3:
                    //map of YETspace
                    implicitIntent = new Intent(Intent.ACTION_VIEW,
                            Uri.parse("geo:30.2715,-97.742"));
                    break;
                case 4:
                    //take a picture( not returning it here though)
                    implicitIntent = new Intent("android.media.action.IMAGE_CAPTURE");
                    break;
                case 5:
                    //edit first contact
                    implicitIntent = new Intent(Intent.ACTION_EDIT,
                            Uri.parse("content://contacts/people/1"));
                    break;

            }

            if(implicitIntent != null){

                if(isIntentAvailable(implicitIntent) == true){ //Syntax Problem here
                    startActivity(implicitIntent);
                }else{
                    Toast.makeText(v.getContext(),"no application available", Toast.LENGTH_LONG).show();
                }
            }

        }
    });

Answer 1

添加这个方法:

private boolean isIntentAvailable(Intent intent) {
    return getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY).size() > 0;
}