我是Android应用程序开发的初学者..我现在已经制作了一个应用程序,其中有一个弹出窗口显示一个人的姓名和详细信息..我已经添加了3个按钮,如CALL,短信,电子邮件..我去了呼叫活动,但它不起作用。没有错误仍有呼叫按钮没有拨打电话..我在新项目中试过的相同代码,它运行良好..但是当我在弹出窗口上执行此操作时,呼叫无效...请帮助我
public class popupinv extends AppCompatActivity {
public Button b;
public void init(){
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_popupinv);
init();
b= (Button) findViewById(R.id.call);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent callIntent=new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:123456));
startActivity(callIntent);
}
});
}
}
你似乎忘了关闭字符串的双引号。
callIntent.setData(Uri.parse("tel:123456"));
检查您在清单中是否拥有良好的权限。
<uses-permission android:name="android.permission.CALL_PHONE"></uses-permission>
编辑:找到它不起作用的原因here
因此,即使您在清单中添加权限,您仍可能具有SecurityException:权限拒绝。
现在没有得到你的许可的重要原因是因为你的项目有23或更高的
targetSdkVersion
,你要求的许可是“危险的”。在Android 6.0中,这包括:
CALL_PHONE
- [...]
这意味着,如果您的targetSdkVersion
> = 23,那么您必须在清单中设置权限并在运行时检查权限。
以下是在运行时检查权限的代码:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b;
b = (Button) findViewById(R.id.button);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkCallPermission();
}
});
}
protected void call() {
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:123456"));
startActivity(callIntent);
}
final int PERMISSION_REQUEST_CALL = 1;
protected void checkCallPermission() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
// Permission is not granted
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.READ_CONTACTS)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
} else {
// No explanation needed; request the permission
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.CALL_PHONE},
PERMISSION_REQUEST_CALL);
}
} else {
// Permission has already been granted
call();
}
return;
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case PERMISSION_REQUEST_CALL: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay!
call();
} else {
// permission denied!
}
return;
}
// other 'case' lines to check for other
// permissions this app might request.
}
}
有关它的更多信息,请查看手册:https://developer.android.com/training/permissions/requesting.html
解决方法:如果您不想在运行时检查权限,则可以使用较少危险的权限:
Intent callIntent = new Intent(Intent.ACTION_DIAL);
callIntent.setData(Uri.parse("tel:123456"));
startActivity(callIntent);
使用此代码,应用程序将不会调用该号码,它将打开带有预填充号码的拨号器。