Android 从服务启动AlertDialog.Builder

我试图使用

AlertDialog.Builder

从服务中启动复选框对话框，但出现以下错误：

当我在不使用

builder.getWindow（）.setType（）的情况下启动对话框时出现此错误。

：

我试图用

builder.getWindow（）.setType（WindowManager.LayoutParams.TYPE\u SYSTEM\u ALERT）对其进行混乱处理

但我有一个错误：

类型的方法getWindow（）未定义

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如果你想在Android
服务中弹出一个对话框，你有两种方法：

将
活动
用作
对话框

使用
AlertDialog.Builder
，但需要将对话框配置为系统警报
使用
dialog.getWindow（）.setType（WindowManager.LayoutParams.TYPE\系统\警报）

以下是示例代码：

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Test dialog"));
builder.setIcon(R.drawable.icon);
builder.setMessage("Content");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int whichButton) {
        //Do something
        dialog.dismiss();
});
builder.setNegativeButton("Close", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int whichButton) {
        dialog.dismiss();
    }
});
AlertDialog alert = builder.create();
alert.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
alert.show();

另外，请记住在AndroidManifest.xml中添加权限

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

将以下代码添加到
停止弹出（）方法中

AlertDialog alertDialog = builder.create();
        alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
        alertDialog.show();

并在清单文件中添加权限

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />


试试这个

创建活动作为对话框主题，并从服务启动该活动

只需在manifest.xml中注册您的活动，如下所示

android:theme="@android:style/Theme.Dialog"

或

MyDialog.java

public class MyDialog extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final AlertDialog alertDialog = new AlertDialog.Builder(this).create();
        alertDialog.setTitle("your title");
        alertDialog.setMessage("your message");
        alertDialog.setIcon(R.drawable.icon);

        alertDialog.show();
    }
}

显示

<service android:name=".HelloService" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

来自销毁活动的呼叫

public class MainActivity extends ActionBarActivity
{

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    startService(new Intent(getBaseContext(), HelloService.class));
}

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item)
{
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings)
    {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

@Override
protected void onDestroy()
{
    // TODO Auto-generated method stub
    super.onDestroy();
    stopService(new Intent(getBaseContext(), HelloService.class));
}
}

最好的

在menifest中设置权限我以前设置过，但使用getWindow时出现问题，我收到了此错误
类型的方法getWindow（）未定义
。检查此链接此处是您的问题答案使用
活动上下文创建AlertDialog。。。它将解决您的问题。谢谢，但您知道为什么对话框窗口的颜色是深灰色而不是普通的浅灰色吗？您可以为警报对话框AlertDialog.Builder=new AlertDialog.Builder设置主题（这是AlertDialog.theme\u HOLO\u light）；
public class MyDialog extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final AlertDialog alertDialog = new AlertDialog.Builder(this).create();
        alertDialog.setTitle("your title");
        alertDialog.setMessage("your message");
        alertDialog.setIcon(R.drawable.icon);

        alertDialog.show();
    }
}

<service android:name=".HelloService" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

public class HelloService extends Service
{

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    // Let it continue running until it is stopped.
    Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
    return START_STICKY;
}
@Override
public void onDestroy() {
    super.onDestroy();
    Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show();

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Test dialog");
    builder.setMessage("Content");
    builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            //Do something
            dialog.dismiss();
        }
    });
    builder.setNegativeButton("Close", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            dialog.dismiss();
        }
    });
    AlertDialog alert = builder.create();
    alert.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
    alert.show();
}
}

public class MainActivity extends ActionBarActivity
{

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    startService(new Intent(getBaseContext(), HelloService.class));
}

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item)
{
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings)
    {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

@Override
protected void onDestroy()
{
    // TODO Auto-generated method stub
    super.onDestroy();
    stopService(new Intent(getBaseContext(), HelloService.class));
}
}

val builder = AlertDialog.Builder(this)
builder.setTitle("")
builder.setMessage("")
builder.setPositiveButton("") { dialogInterface, i ->
}
builder.setNegativeButton("1 Year") { dialogInterface, i ->
}
val alert = builder.create()
alert.show()