ListPopupWindow无法在Android 4.2上点击，但在Android 7.0中运行良好

Question

我用Adroid Studio 3.0编写了一个简单的APP（通过基本活动模板）：     在＆＃34; content_main＆＃34;布局，只有＆＃34; EditText＆＃34;     Feature1：当我点击＆＃34; EditText＆＃34;时，将显示IME                 并且还将显示ListPopupWindow以及字符串列表。     Feature2：此时，我可以继续输入EditText，同时显示ListPopupWindow。     Feature3：我可以滚动ListPopupWindow并单击一个项目，                 然后该项目将在EditText中显示，ListPopupWindow将被解除。

我的问题是：

Running on Android 7.0, I can select one item in the ListPopupWindow.
But on Android 4.2, the items in ListPopupWindow can not be clicked.

我的分析：     如果我变为：listPopupWindow.setModal（true），     Feature2无法实现。

以下是关键源代码：

MainActivity extends AppCompatActivity implements OnItemClickListener {
    EditText productName;
    ListPopupWindow listPopupWindow;
    String[] products={"Camera", "Laptop", "Watch","Smartphone", "Television"};

    public void onItemClick(AdapterView<?> parent, View view,
                        int position, long id) {
        productName.setText(products[position]);
        listPopupWindow.dismiss();
    }

    protected void onCreate(Bundle savedInstanceState) {
        ...
        productName = (EditText) findViewById(R.id.product_name);

        listPopupWindow = new ListPopupWindow(MainActivity.this);
        listPopupWindow.setAdapter(new ArrayAdapter(
                MainActivity.this,
                R.layout.list_item, products));

        listPopupWindow.setAnchorView(productName);

        listPopupWindow.setModal(false);

        listPopupWindow.setOnItemClickListener(
                MainActivity.this);
        productName.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                listPopupWindow.show();
            }
        });
    }
}

Answer 1

您可以使用<?php $folder_path='c:/wwwroot/content/stack'; /* find all files in chosen folder */ $col=glob( $folder_path . '\*.*' ); /* filter only text files for processing */ $col=preg_grep( '@(\.txt$)@i', $col ); /* Proceed if there are text files only */ if( !empty( $col ) && count( $col ) > 0 ){ /* iterate through collection */ foreach( $col as $index => $filepath ){ /* read file contents into an array */ $lines=file( $filepath ); /* store altered lines in temp array */ $content=array(); /* trim the start of each line & store into temp array */ foreach( $lines as $line )if( !empty( $line ) ) $content[]=ltrim( $line ); /* output file contents */ file_put_contents( $filepath, implode( PHP_EOL, $content ) ); echo file_get_contents( $filepath ) . PHP_EOL . PHP_EOL; } printf( "finito! %d files processed",count( $col ) ); } else { echo "nothing to process"; } ?> 代替普通AutoCompleteTextView，而无需使用EditText，自动填充将执行您需要的任务，因为您希望在撰写时向用户显示建议一些东西。这里是 Reference