是的,我知道有AlertDialog。但我很惊讶地知道在Android中显示对话框有多么困难(好吧,至少不是程序员友好的)。
我曾经是一名。net开发人员,我想知道在android上是否有类似的功能?
if (MessageBox.Show("Sure?", "", MessageBoxButtons.YesNo) == DialogResult.Yes){
// Do something...
}
是的,我知道有AlertDialog。但我很惊讶地知道在Android中显示对话框有多么困难(好吧,至少不是程序员友好的)。
我曾经是一名。net开发人员,我想知道在android上是否有类似的功能?
if (MessageBox.Show("Sure?", "", MessageBoxButtons.YesNo) == DialogResult.Yes){
// Do something...
}
当前回答
这里所有的答案都归结为冗长且不利于读者的代码:这正是提问者试图避免的。对我来说,最简单的方法是在这里使用lambdas:
new AlertDialog.Builder(this)
.setTitle("Are you sure?")
.setMessage("If you go back you will loose any changes.")
.setPositiveButton("Yes", (dialog, which) -> {
doSomething();
dialog.dismiss();
})
.setNegativeButton("No", (dialog, which) -> dialog.dismiss())
.show();
Android中的Lambdas需要retrolambda插件(https://github.com/evant/gradle-retrolambda),但无论如何,它对编写更清晰的代码非常有帮助。
其他回答
问一个人他是否想打电话对话。
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.Toast;
public class Firstclass extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.first);
ImageView imageViewCall = (ImageView) findViewById(R.id.ring_mig);
imageViewCall.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v){
try{
showDialog("0728570527");
} catch (Exception e){
e.printStackTrace();
}
}
});
}
public void showDialog(final String phone) throws Exception {
AlertDialog.Builder builder = new AlertDialog.Builder(Firstclass.this);
builder.setMessage("Ring: " + phone);
builder.setPositiveButton("Ring", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which){
Intent callIntent = new Intent(Intent.ACTION_DIAL);// (Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:" + phone));
startActivity(callIntent);
dialog.dismiss();
}
});
builder.setNegativeButton("Abort", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which){
dialog.dismiss();
}
});
builder.show();
}
}
AlertDialog。Builder真的没有那么难用。一开始肯定有点吓人,但一旦你使用了一点,它就变得简单而强大了。我知道你说过你知道如何使用它,但这里只是一个简单的例子:
DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which){
case DialogInterface.BUTTON_POSITIVE:
//Yes button clicked
break;
case DialogInterface.BUTTON_NEGATIVE:
//No button clicked
break;
}
}
};
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setMessage("Are you sure?").setPositiveButton("Yes", dialogClickListener)
.setNegativeButton("No", dialogClickListener).show();
你也可以重用那个DialogInterface。OnClickListener如果你有其他是/否框,应该做同样的事情。
如果你是从视图中创建对话框。OnClickListener,你可以使用view.getContext()来获取Context。或者你也可以使用yourFragmentName.getActivity()。
你可以在Kotlin中轻松完成:
alert("Testing alerts") {
title = "Alert"
yesButton { toast("Yess!!!") }
noButton { }
}.show()
谢谢尼基,你的回答帮助我改善了现有的简单添加我想要的行动如下
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Do this action");
builder.setMessage("do you want confirm this action?");
builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Do do my action here
dialog.dismiss();
}
});
builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// I do not need any action here you might
dialog.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();
1.创建AlertDialog,设置消息、标题和正面、负面按钮:
final AlertDialog alertDialog = new AlertDialog.Builder(this)
.setCancelable(false)
.setTitle("Confirmation")
.setMessage("Do you want to remove this Picture?")
.setPositiveButton("Yes",null)
.setNegativeButton("No",null)
.create();
2.现在在DialogInterface上找到两个按钮,然后单击setOnClickListener():
alertDialog.setOnShowListener(new DialogInterface.OnShowListener() {
@Override
public void onShow(DialogInterface dialogInterface) {
Button yesButton = (alertDialog).getButton(android.app.AlertDialog.BUTTON_POSITIVE);
Button noButton = (alertDialog).getButton(android.app.AlertDialog.BUTTON_NEGATIVE);
yesButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//Now Background Class To Update Operator State
alertDialog.dismiss();
Toast.makeText(GroundEditActivity.this, "Click on Yes", Toast.LENGTH_SHORT).show();
//Do Something here
}
});
noButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
alertDialog.dismiss();
Toast.makeText(GroundEditActivity.this, "Click on No", Toast.LENGTH_SHORT).show();
//Do Some Thing Here
}
});
}
});
3.To 显示警报对话框:
alertDialog.show();
注意:不要忘记AlertDialog的Final Keyword。