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
这对我来说很管用:
AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());
builder.setTitle("Confirm");
builder.setMessage("Are you sure?");
builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Do nothing, but close the dialog
dialog.dismiss();
}
});
builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// Do nothing
dialog.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();
其他回答
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()。
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();
你可以为决策实现一个通用的解决方案,并在另一种情况下使用,而不仅仅是yes/no和自定义警报动画或布局:
像这样的东西;首先创建用于传输数据的类:
public class AlertDecision {
private String question = "";
private String strNegative = "";
private String strPositive = "";
public AlertDecision question(@NonNull String question) {
this.question = question;
return this;
}
public AlertDecision ansPositive(@NonNull String strPositive) {
this.strPositive = strPositive;
return this;
}
public AlertDecision ansNegative(@NonNull String strNegative) {
this.strNegative = strNegative;
return this;
}
public String getQuestion() {
return question;
}
public String getAnswerNegative() {
return strNegative;
}
public String getAnswerPositive() {
return strPositive;
}
}
后的接口,用于返回结果
public interface OnAlertDecisionClickListener {
/**
* Interface definition for a callback to be invoked when a view is clicked.
*
* @param dialog the dialog that was clicked
* @param object The object in the position of the view
*/
void onPositiveDecisionClick(DialogInterface dialog, Object object);
void onNegativeDecisionClick(DialogInterface dialog, Object object);
}
现在你可以很容易地创建一个utils(在这个类中,你可以为警报实现不同的动画或自定义布局):
public class AlertViewUtils {
public static void showAlertDecision(Context context,
@NonNull AlertDecision decision,
final OnAlertDecisionClickListener listener,
final Object object) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setMessage(decision.getQuestion());
builder.setPositiveButton(decision.getAnswerPositive(),
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
listener.onPositiveDecisionClick(dialog, object);
}
});
builder.setNegativeButton(decision.getAnswerNegative(),
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
listener.onNegativeDecisionClick(dialog, object);
}
});
android.support.v7.app.AlertDialog dialog = builder.create();
dialog.show();
}
}
最后是活动或片段的召唤;你可以在你的案例或其他任务中使用这个:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
initResources();
}
public void initResources() {
Button doSomething = (Button) findViewById(R.id.btn);
doSomething.setOnClickListener(getDecisionListener());
}
private View.OnClickListener getDecisionListener() {
return new View.OnClickListener() {
@Override
public void onClick(View v) {
AlertDecision decision = new AlertDecision()
.question("question ...")
.ansNegative("negative action...")
.ansPositive("positive action... ");
AlertViewUtils.showAlertDecision(MainActivity.this,
decision, getOnDecisionListener(), v);
}
};
}
private OnAlertDecisionClickListener getOnDecisionListener() {
return new OnAlertDecisionClickListener() {
@Override
public void onPositiveDecisionClick(DialogInterface dialog, Object object) {
//do something like create, show views, etc...
}
@Override
public void onNegativeDecisionClick(DialogInterface dialog, Object object) {
//do something like delete, close session, etc ...
}
};
}
}
AlertDialog.Builder altBx = new AlertDialog.Builder(this);
altBx.setTitle("My dialog box");
altBx.setMessage("Welcome, Please Enter your name");
altBx.setIcon(R.drawable.logo);
altBx.setPositiveButton("Ok", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
if(edt.getText().toString().length()!=0)
{
// Show any message
}
else
{
}
}
});
altBx.setNeutralButton("Cancel", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
//show any message
}
});
altBx.show();
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();
}
}