使用此代码将用户发送到拨号屏幕非常简单
EditText firstNumber;
Button btnAdd;
String hash;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main23);
btnAdd = (Button)findViewById(R.id.button2);
btnAdd.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
EditText et = (EditText) findViewById(R.id.editText);
String text= et.getEditableText().toString();
hash = "#";
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:*221*" + text + "hash"));
startActivity(intent);
} catch (Exception e) {
}
}
});
}
但是，当我希望用户通过按钮自动拨打电话时，按钮应自动拨打电话。我用 android.permission.CALL_PHONE 设置了它，我使用下面的代码 ....
EditText firstNumber;
EditText secondNumber;
Button btnAdd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
//assigning where the button5 to btnAdd
btnAdd = (Button)findViewById(R.id.button5);
// set up my setOnClickListener for button
btnAdd.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
//stores whats inside of the editText2 to et and et2
EditText et = (EditText) findViewById(R.id.editText2);
EditText et2 = (EditText) findViewById(R.id.editText5);
//stores whats been sent to et and et2 variables to text and text2
String text= et.getEditableText().toString();
String text2 =et2.getEditableText().toString();
// new intent to take user to dial screen and make the call automatically.
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:*215*" + text + "*" + text2 + "#"));
callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// crashes here "i get red squigglies here "
startActivity(callIntent);
} catch (Exception e) {
}
}
});
}
我在 startActivity（callIntent）; 下得到了一个波浪形状，说明“呼叫需要用户可能拒绝的许可。代码要明确检查以查看权限是否可用”。我如何让它在运行时运行？
答案 0 :(得分：0)
您应该使用动态权限请求（运行时请求）
private static final int MY_PERMISSIONS_REQUEST_CALL_PHONE = 1;
EditText in_number;
Intent c;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity__phone_call);
in_number = (EditText) findViewById(R.id.in_number);
}
public void CALL(View v) {
int toCall = Integer.parseInt(in_number.getText().toString());
c = new Intent(Intent.ACTION_CALL);
c.setData(Uri.parse("tel:"+toCall));
startActivity(c);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CALL_PHONE)) {
// 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.
Toast.makeText(this,"FROM shouldShowRequestPermissionRationale",Toast.LENGTH_LONG).show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CALL_PHONE}, MY_PERMISSIONS_REQUEST_CALL_PHONE);
// MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
// app-defined int constant. The callback method gets the
// result of the request.
Toast.makeText(this,"FROM requestPermissions",Toast.LENGTH_LONG).show();
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_CALL_PHONE: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
Toast.makeText(this,"FROM starting ACT",Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this,"FROM problem",Toast.LENGTH_LONG).show();
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
}
... XML
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_editor_absoluteX="0dp"
app:layout_editor_absoluteY="0dp"
tools:context="com.jupiter.alienjo.intents.Activity_TakePicture">
<RelativeLayout
android:layout_width="344dp"
android:layout_height="495dp"
app:layout_editor_absoluteX="0dp"
app:layout_editor_absoluteY="0dp"
tools:ignore="MissingConstraints"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="-185dp">
<Button
android:id="@+id/btn_call"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:onClick="CALL"
android:text="call this Number"
android:textSize="24sp"
android:textStyle="bold" />
<EditText
android:id="@+id/in_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/btn_call"
android:layout_centerHorizontal="true"
android:layout_marginBottom="71dp"
android:ems="10"
android:inputType="number" />
</RelativeLayout>
</android.support.constraint.ConstraintLayout>
...还要将其添加到清单文件中以支持旧版本api
<uses-permission android:name="android.permission.CALL_PHONE" />