- 我有一个文本输入对话框,当我点击对话框上的“是”按钮,它会验证输入,然后关闭对话框。
- 但是,如果输入错误,我想停留在同一个对话框中.。
每一次,无论输入是什么,对话框应该自动关闭,当我点击“否”按钮。我怎么才能禁用这个?在网上找了很多,大部分都是修改布局,添加取消确定什么的,这样并不理想。
现在有个好方案,记录下来先:
//重写“确定”(AlertDialog.BUTTON_POSITIVE),截取监听
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(MainActivity.this,"getButton(AlertDialog.BUTTON_POSITIVE)", Toast.LENGTH_LONG).show();
//这里可以控制是否让对话框消失
dialog.dismiss();
}
});
完整java代码如下:
package com.github.azhansy.dialognotdismissdemo;
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
//这里随便在主布局加个监听事件即可
public void onClickText(View vv){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("对话框标题");
View view = View.inflate(this, R.layout.dialog_input_link, null);
final EditText linkEdt = (EditText) view.findViewById(R.id.edt_input_link);
ImageView clearIv = (ImageView) view.findViewById(R.id.iv_clear_link);
builder.setView(view);
clearIv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
linkEdt.getText().clear();
}
});
builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(MainActivity.this,"确定", Toast.LENGTH_LONG).show();
}
});
builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(MainActivity.this,"取消", Toast.LENGTH_LONG).show();
}
});
final AlertDialog dialog = builder.create();
dialog.setCanceledOnTouchOutside(false);
dialog.show();
//重写“确定”,截取监听
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(MainActivity.this,"getButton(AlertDialog.BUTTON_POSITIVE)", Toast.LENGTH_LONG).show();
//这里可以控制是否让对话框消失
dialog.dismiss();
}
});
}
}
对话框布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="10dp"
android:paddingRight="10dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/edt_input_link"
android:layout_width="match_parent"
android:layout_height="48dp"
android:gravity="center_vertical"
android:maxLines="1"
android:paddingRight="30dp"
android:textSize="16sp"
tools:text="fhafafa"/>
<ImageView
android:id="@+id/iv_clear_link"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:scaleType="center"
android:src="@drawable/ic_clear"/>
</RelativeLayout>
</LinearLayout>
另外一种方案:
在show的监听器里面重写,这样可以避免在对话框show之前getButton为空的错误:
final AlertDialog dialog = new AlertDialog.Builder(context)
.setView(v)
.setTitle(R.string.my_title)
.setPositiveButton(android.R.string.ok, null) //Set to null. We override the onclick
.setNegativeButton(android.R.string.cancel, null)
.create();
dialog.setOnShowListener(new DialogInterface.OnShowListener() {
@Override
public void onShow(DialogInterface dialog) {
Button button = ((AlertDialog) dialog).getButton(AlertDialog.BUTTON_POSITIVE);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// TODO Do something
//Dismiss once everything is OK.
dialog.dismiss();
}
});
}
});