很久过去了。但可能会帮助别人。如果你想直接调用,你应该使用requestPermissions方法。
1.将此行添加到您的清单文件中:
<uses-permission android:name="android.permission.CALL_PHONE" />
2.在activity类中定义一个类变量:
private static Intent phoneCallIntent; //If use don't need a member variable is good to use a static variable for memory performance.
3.将这些行添加到活动的onCreate方法中:
final String permissionToCall = Manifest.permission.CALL_PHONE;
//Assume that you have a phone icon.
(findViewById(R.id.menuBarPhone)).setOnClickListener(new OnClickListener(){
public void onClick(View view) {
phoneCallIntent = new Intent(Intent.ACTION_CALL);
phoneCallIntent.setData(Uri.parse(getString(R.string.callNumber))); //Uri.parse("tel:your number")
if (ActivityCompat.checkSelfPermission(MainFrame.this, permissionToCall) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainFrame.this, new String[]{permissionToCall}, 1);
return;
}
startActivity(phoneCallIntent);
}
});
4.点击允许按钮后立即拨打电话,覆盖onRequestPermissionsResult方法:
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults){
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if(requestCode == 1){
final int permissionsLength = permissions.length;
for (int i = 0; i < permissionsLength; i++) {
if(grantResults[i] == PackageManager.PERMISSION_GRANTED){
startActivity(phoneCallIntent);
}
}
}
当用户授予权限后,下次不会出现对话框,直接拨打电话。