本示例允许用户动态加载手机通讯录中的电话号码，勾选某些号码为黑名单，一旦将某些号码设为黑名单，当该号码呼入时，系统将会自动挂断该号码。
Android 没有对外公开挂断电话的 API，下面的示例中使用将使用反射机制来调用 ITelephony 的内部接口 silenceRinger 和 endCall。
本文参考文献：《疯狂Android讲义 : 第2版 》
本文参考文章： 《Android 6.0 - 动态权限管理的解决方案》
本文的反射方法参考链接：How to import com.android.internal.telephony.ITelephony to the Android application
检测权限工具类
检测权限工具类，我们可以将其在多个应用中复用：
package com.toby.personal.testlistview;
import android.content.Context;
import android.content.pm.PackageManager;
import android.support.v4.content.ContextCompat;
import android.util.Log;
/**
* Created by toby on 2017/4/29.
*/
class PermissionsChecker {
private final Context mContext;
PermissionsChecker(Context context) {
mContext = context.getApplicationContext();
}
// 判断权限集合
boolean lacksPermissions(String... permissions) {
for (String permission : permissions) {
if (lacksPermission(permission)) {
Log.d("","jkdfksahdfkhsadkjghdfskg: " + permission);
return true;
}
}
return false;
}
// 判断是否缺少权限
private boolean lacksPermission(String permission) {
return ContextCompat.checkSelfPermission(mContext, permission) ==
PackageManager.PERMISSION_DENIED;
}
}
授权页
授权页, 首先使用系统默认的授权页, 当用户拒绝时, 指导用户手动设置, 当用户再次操作失败后, 返回继续提示。用户手动退出授权页时, 给使用页发送授权失败的通知。我们可以保存这个授权页并将其在多个应用中复用。
package com.toby.personal.testlistview;
import android.app.Activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
/**
* Created by toby on 2017/4/29.
*/
public class PermissionsActivity extends AppCompatActivity {
public static final int PERMISSIONS_GRANTED = 0; // 权限授权
public static final int PERMISSIONS_DENIED = 1; // 权限拒绝
private static final int PERMISSION_REQUEST_CODE = 0; // 系统权限管理页面的参数
private static final String EXTRA_PERMISSIONS =
"com.toby.personal.permission.extra_permission"; // 权限参数
private static final String PACKAGE_URL_SCHEME = "package:"; // 方案
private PermissionsChecker mChecker; // 权限检测器
private boolean isRequireCheck; // 是否需要系统权限检测, 防止和系统提示框重叠
// 启动当前权限页面的公开接口
public static void startActivityForResult(Activity activity, int requestCode, String... permissions) {
Intent intent = new Intent(activity, PermissionsActivity.class);
intent.putExtra(EXTRA_PERMISSIONS, permissions);
ActivityCompat.startActivityForResult(activity, intent, requestCode, null);
}
@Override protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getIntent() == null || !getIntent().hasExtra(EXTRA_PERMISSIONS)) {
throw new RuntimeException("PermissionsActivity需要使用静态startActivityForResult方法启动!");
}
setContentView(R.layout.activity_permissions);
mChecker = new PermissionsChecker(this);
isRequireCheck = true;
}
@Override protected void onResume() {
super.onResume();
if (isRequireCheck) {
String[] permissions = getPermissions();
if (mChecker.lacksPermissions(permissions)) {
requestPermissions(permissions); // 请求权限
} else {
allPermissionsGranted(); // 全部权限都已获取
}
} else {
isRequireCheck = true;
}
}
// 返回传递的权限参数
private String[] getPermissions() {
return getIntent().getStringArrayExtra(EXTRA_PERMISSIONS);
}
// 请求权限兼容低版本
private void requestPermissions(String... permissions) {
ActivityCompat.requestPermissions(this, permissions, PERMISSION_REQUEST_CODE);
}
// 全部权限均已获取
private void allPermissionsGranted() {
setResult(PERMISSIONS_GRANTED);
finish();
}
/**
* 用户权限处理,
* 如果全部获取, 则直接过.
* 如果权限缺失, 则提示Dialog.
*
* @param requestCode 请求码
* @param permissions 权限
* @param grantResults 结果
*/
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if (requestCode == PERMISSION_REQUEST_CODE && hasAllPermissionsGranted(grantResults)) {
isRequireCheck = true;
allPermissionsGranted();
} else {
isRequireCheck = false;
showMissingPermissionDialog();
}
}
// 含有全部的权限
private boolean hasAllPermissionsGranted(@NonNull int[] grantResults) {
for (int grantResult : grantResults) {
if (grantResult == PackageManager.PERMISSION_DENIED) {
return false;
}
}
return true;
}
// 显示缺失权限提示
private void showMissingPermissionDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(PermissionsActivity.this);
builder.setTitle(R.string.help);
builder.setMessage(R.string.string_help_text);
// 拒绝, 退出应用
builder.setNegativeButton(R.string.quit, new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
setResult(PERMISSIONS_DENIED);
finish();
}
});
builder.setPositiveButton(R.string.settings, new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
startAppSettings();
}
});
builder.setCancelable(false);
builder.show();
}
// 启动应用的设置
private void startAppSettings() {
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
intent.setData(Uri.parse(PACKAGE_URL_SCHEME + getPackageName()));
startActivity(intent);
}
}
需要在 AndroidManifest.xml 中加入权限的申请内容：
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.CALL_PHONE" />
主布局文件的内容如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorGray"
android:orientation="vertical">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:onClick="Settings"
android:text="@string/settings" />
</LinearLayout>
my_list_view.xml 文件的代码如下：
<?xml version="1.0" encoding="utf-8"?>
<ListView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/listV"
android:layout_width="match_parent"
android:layout_height="400dp"
android:background="@color/colorPrimaryDark"
/>
主程序文件的代码如下：
package com.toby.personal.testlistview;
import android.Manifest;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.Toast;
import java.io.FileNotFoundException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
final private static String TAG = "Toby_Test";
final private static int REQUEST_CODE = 29; // 请求码
ArrayList<String> blockList = new ArrayList<>();
static final String[] PERMISSIONS = new String[]{
Manifest.permission.READ_PHONE_STATE
, Manifest.permission.READ_CONTACTS
, Manifest.permission.CALL_PHONE
};
private PermissionsChecker permissionsChecker;
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.d(TAG, "=========== onCreate ===========");
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
permissionsChecker = new PermissionsChecker(this);
}
@Override
protected void onResume() {
super.onResume();
if (permissionsChecker.lacksPermissions(PERMISSIONS)) {
startPermissionsActivity();
}
}
private void startPermissionsActivity() {
PermissionsActivity.startActivityForResult(this, REQUEST_CODE, PERMISSIONS);
}
public void startListener() {
final TelephonyManager telephonyManager =
(TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
PhoneStateListener listener = new PhoneStateListener() {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
switch (state) {
case TelephonyManager.CALL_STATE_RINGING:
if (isBlock(incomingNumber)) {
try {
Method m1 = telephonyManager.getClass().getDeclaredMethod("getITelephony");
if (m1 != null) {
m1.setAccessible(true);
Object iTelephony = m1.invoke(telephonyManager);
if (iTelephony != null) {
Method m2 = iTelephony.getClass().getDeclaredMethod("silenceRinger");
if (m2 != null) {
m2.invoke(iTelephony);
}
Method m3 = iTelephony.getClass().getDeclaredMethod("endCall");
if (m3 != null) {
m3.invoke(iTelephony);
}
}
}
} catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
e.printStackTrace();
}
}
break;
default:
break;
}
super.onCallStateChanged(state, incomingNumber);
}
};
telephonyManager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// 拒绝时, 关闭页面, 缺少主要权限, 无法运行
if (requestCode == REQUEST_CODE && resultCode == PermissionsActivity.PERMISSIONS_DENIED) {
finish();
}
}
public void Settings(View view) {
final Cursor cursor =
getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null, null, null, null);
BaseAdapter adapter = new BaseAdapter() {
@Override
public int getCount() {
return cursor != null ? cursor.getCount() : 0;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (cursor != null) {
cursor.moveToPosition(position);
CheckBox rb = new CheckBox(MainActivity.this);
String number = cursor.getString(cursor.getColumnIndex(
ContactsContract.CommonDataKinds.Phone.NUMBER)).replace("-", "");
rb.setText(number);
if (isBlock(number)) {
rb.setChecked(true);
}
return rb;
}
return null;
}
};
View selectView = getLayoutInflater().inflate(R.layout.my_list_view, null);
final ListView listView = (ListView) selectView.findViewById(R.id.listV);
listView.setAdapter(adapter);
new AlertDialog.Builder(this).setView(selectView)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
blockList.clear();
for (int i = 0; i < listView.getCount(); ++i) {
CheckBox checkBox = (CheckBox) listView.getChildAt(i);
if (checkBox.isChecked()) {
blockList.add(checkBox.getText().toString());
}
}
Log.d(TAG, blockList.toString());
startListener();
}
}).show();
}
private boolean isBlock(String phone) {
Log.d(TAG, blockList.toString());
for (String s1 : blockList) {
if (s1.equals(phone)) {
return true;
}
}
return false;
}
}
