如何在Android中的警报对话框中验证文本框

Question

我正在使用一些文本框进行警报对话框，其中需要验证文本框，如果它们仅正确，则需要消失弹出消息这里的问题是，如果用户单击"确定"按钮（带有空值）弹出消息正在消失。预先感谢...

final AlertDialog.Builder builder = new AlertDialog.Builder(KmsActivity.this);
builder.setTitle("Enter OrderId,BillNo");
builder.setCancelable(false);
final EditText input1 = new EditText(KmsActivity.this);
final EditText input2 = new EditText(KmsActivity.this);
input1.setHint("Enter OrderId");
input2.setHint("Enter BillNo");
LinearLayout linearLayout = new LinearLayout(KmsActivity.this);
linearLayout.setOrientation(LinearLayout.VERTICAL);
linearLayout.addView(input1);
linearLayout.addView(input2);
builder.setView(linearLayout);
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface popupDialog, int which) {
        String orderId = input1.getText().toString();
        String billNo = input2.getText().toString();
        Log.d(TAG_NAME, "order id:" + orderId);
        Log.d(TAG_NAME, "bill no" + billNo);
        if (orderId.length()<=0) {
            Toast.makeText(KmsActivity.this, "Please enter Order ID", Toast.LENGTH_LONG).show();
        } else if (billNo.length()<=0) {
            Toast.makeText(KmsActivity.this, "Please enter Bill No", Toast.LENGTH_LONG).show();
        } else {
            tripObjects.get(0).setOrderId(orderId);
            tripObjects.get(0).setBillNo(billNo);
            tripObjects.get(0).saveInBackground();
            Toast.makeText(KmsActivity.this, "values uploaded", Toast.LENGTH_LONG).show();
            popupDialog.cancel();
        }
    }
});
builder.show();

Answer 1

您可以在带有吐司消息的条件的正面单击按钮上调用文本验证方法。或者，您可以将AddTextchangelistener添加到您要输入文本的文本视图中，每次更改文本时调用验证方法。

Answer 2

第一个导入类AS - import android.support.v7.app.AlertDialog;

然后尝试此 -

final EditText input1 = new EditText(MainActivity.this);
        final EditText input2 = new EditText(MainActivity.this);
        input1.setHint("Enter name1");
        input2.setHint("Enter Name2");
        LinearLayout linearLayout = new LinearLayout(this);
        linearLayout.setOrientation(LinearLayout.VERTICAL);
        linearLayout.addView(input1);
        linearLayout.addView(input2);
        final AlertDialog builder = new AlertDialog.Builder(MainActivity.this)
                .setTitle("Sign In Failed")
                .setCancelable(false)
                .setMessage("Invalid username or password").setView(linearLayout).setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                    }
                }).create();
        builder.show();
        ((AlertDialog)builder).getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (input1.length() <= 0) {
                    Toast.makeText(MainActivity.this, "Please Enter Name", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(MainActivity.this, "OK", Toast.LENGTH_SHORT).show();
                    builder.dismiss();
                }
            }
        });