一、页面简单的效果图
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/tishi"
android:textSize="25sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/editText"
android:layout_width="373dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:hint="@string/hint"
android:text=""
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<Button
android:id="@+id/btnPhone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="@string/btn_phone"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText" />
二、抽取的获取权限的类
安卓6.0之后要使用时要一个一个询问权限才行，故要创建此类
package com.example.phonecall;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;
/**
* @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 ****************************************
}
三、主类中实现点击拨打电话
package com.example.phonecall;
import android.Manifest;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends BaseActivity {//此处改为继承基础权限类
private Button mBtnPhone;
private EditText mEditText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mBtnPhone = findViewById(R.id.btnPhone);//获取拨打电话按钮
mEditText = findViewById(R.id.editText);//获取文本编辑框
//给按钮添加点击事件
mBtnPhone.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
performCodeWithPermission("获取拨号权限", new PermissionCallback() {
@Override
public void hasPermission() {
//授予了拨号权限
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + mEditText.getText()));
startActivity(intent);
}
@Override
public void noPermission() {
//未授予拨号权限
Toast.makeText(MainActivity.this,"未授予权限", Toast.LENGTH_SHORT).show();
}
}, Manifest.permission.CALL_PHONE);
}
});
}
}
四、模拟器运行
