1、添加权限
在AndroidManifest.xml 添加打电话权限
<uses-permission android:name="android.permission.CALL_PHONE"/>
2、自动布局设置页面
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
tools:context=".MainActivity"> <TextView
android:id="@+id/tv_phone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
android:text="@string/textPhone"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" /> <EditText
android:id="@+id/et_phone"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:layout_marginRight="10dp"
android:hint="@string/textPhoneHint"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_phone" /> <Button
android:id="@+id/btn_call"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="16dp"
android:text="@string/textPhoneButton"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et_phone" /> </androidx.constraintlayout.widget.ConstraintLayout>
页面效果
3、给Activity添加拔打代码
public class MainActivity extends BaseActivity {
private Button eBtCall;
private EditText mEtPhone;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
eBtCall = findViewById(R.id.btn_call);
mEtPhone = findViewById(R.id.et_phone);
eBtCall.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
performCodeWithPermission("拔打电话权限", new PermissionCallback() {
@Override
public void hasPermission() {
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + mEtPhone.getText()));
startActivity(intent);
}
@Override
public void noPermission() {
}
}, Manifest.permission.CALL_PHONE);
}
});
}
}4、这里要注意，安卓在6.0之后是动态申请系统权限，因而封装一个权限的BaseActivity类，专门用于处理权限相关的。
package com.jiangys.telephonedial; import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.os.Build;
import android.widget.Toast; import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat; /**
* @author Admin
* @version $Rev$
* @des ${TODO}
* @updateAuthor $Author$
* @updateDes ${TODO}
*/
public class BaseActivity extends AppCompatActivity {
//**************** Android M Permission (Android 6.0权限控制代码封装)
private int permissionRequestCode = 88;
private PermissionCallback permissionRunnable; public interface PermissionCallback {
void hasPermission(); void noPermission();
} /**
* Android M运行时权限请求封装
*
* @param permissionDes 权限描述
* @param runnable 请求权限回调
* @param permissions 请求的权限（数组类型），直接从Manifest中读取相应的值，比如Manifest.permission.WRITE_CONTACTS
*/
public void performCodeWithPermission(@NonNull String permissionDes, PermissionCallback runnable, @NonNull String... permissions) {
if (permissions == null || permissions.length == 0)
return;
// this.permissionrequestCode = requestCode;
this.permissionRunnable = runnable;
if ((Build.VERSION.SDK_INT < Build.VERSION_CODES.M) || checkPermissionGranted(permissions)) {
if (permissionRunnable != null) {
permissionRunnable.hasPermission();
permissionRunnable = null;
}
} else {
//permission has not been granted.
requestPermission(permissionDes, permissionRequestCode, permissions);
} } private boolean checkPermissionGranted(String[] permissions) {
boolean flag = true;
for (String p : permissions) {
if (ActivityCompat.checkSelfPermission(this, p) != PackageManager.PERMISSION_GRANTED) {
flag = false;
break;
}
}
return flag;
} private void requestPermission(String permissionDes, final int requestCode, final String[] permissions) {
if (shouldShowRequestPermissionRationale(permissions)) {
/*1. 第一次请求权限时，用户拒绝了，下一次：shouldShowRequestPermissionRationale() 返回 true，应该显示一些为什么需要这个权限的说明
2.第二次请求权限时，用户拒绝了，并选择了“不在提醒”的选项时：shouldShowRequestPermissionRationale() 返回 false
3. 设备的策略禁止当前应用获取这个权限的授权：shouldShowRequestPermissionRationale() 返回 false*/
// Provide an additional rationale to the user if the permission was not granted
// and the user would benefit from additional context for the use of the permission.
// For example, if the request has been denied previously. // Snackbar.make(getWindow().getDecorView(), requestName,
// Snackbar.LENGTH_INDEFINITE)
// .setAction(R.string.common_ok, new View.OnClickListener() {
// @Override
// public void onClick(View view) {
// ActivityCompat.requestPermissions(BaseAppCompatActivity.this,
// permissions,
// requestCode);
// }
// })
// .show();
//如果用户之前拒绝过此权限，再提示一次准备授权相关权限
new AlertDialog.Builder(this)
.setTitle("提示")
.setMessage(permissionDes)
.setPositiveButton("授权", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions(BaseActivity.this, permissions, requestCode);
}
}).show(); } else {
// Contact permissions have not been granted yet. Request them directly.
ActivityCompat.requestPermissions(BaseActivity.this, permissions, requestCode);
}
} private boolean shouldShowRequestPermissionRationale(String[] permissions) {
boolean flag = false;
for (String p : permissions) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, p)) {
flag = true;
break;
}
}
return flag;
} /**
* Callback received when a permissions request has been completed.
*/
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
@NonNull int[] grantResults) {
if (requestCode == permissionRequestCode) {
if (verifyPermissions(grantResults)) {
if (permissionRunnable != null) {
permissionRunnable.hasPermission();
permissionRunnable = null;
}
} else {
Toast.makeText(this, "暂无权限执行相关操作！", Toast.LENGTH_SHORT).show();
if (permissionRunnable != null) {
permissionRunnable.noPermission();
permissionRunnable = null;
}
}
} else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
} } public boolean verifyPermissions(int[] grantResults) {
// At least one result must be checked.
if (grantResults.length < 1) {
return false;
} // Verify that each required permission has been granted, otherwise return false.
for (int result : grantResults) {
if (result != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
return true;
}
//********************** END Android M Permission ****************************************
}