[深圳特色][问答网]打电话的操作，运行在6.0上为什么崩溃？ - 黑马程序员技术交流社区

google刚刚推出的6.0新特性，新特性中增加了全新的权限系统，通过深圳的问答网，我们一起来看看深圳师生对这个问题的探讨

。

前言：当targetSdkVersion 和系统同时大于等于api23，即6.0（M）时，像我们之前的所请求的权限操作，即会无效。依然会报SecurityException。这是由于android6.0采用全新的权限系统。根据谷歌官网介绍：file:///C:/Users/yuqiqi/Documents/My%20Knowledge/temp/1667869a-3f85-43a9-9ea1-a244b031472b_4_files/1d6ef9a9-6f99-440b-a639-e6f83633b717.png
在android6.0之后，app安装时不再回向用户请求权限，而是在app运行时，需要用到某个权限的时候，才向用户请求。如果不请求，即使你在清单文件中注册了权限，程序也依然会崩溃！（已经上线的app不用担心，由于那些app的targetSdkVersion小于23，系统默认和以前一样处理。）
权限分组：在新的权限系统中，权限被分组为：

现在我们知道了，程序员们需要警惕的就是权限组中的权限啦！！！
比如向SDK中写入数据的权限，我们需要如何去手动请求呢？通过查询官方文档https://developer.android.com/tr ... ons/requesting.html，可知:1.首先我们需要检查系统是否已经授予了该app此项权限，通过调用ContextCompat.checkSelfPermission（Context context,String permission）方法可以实现。checkSelfPermission（）方法会返回两个值：
PERMISSION_GRANTED授予 PERMISSION_DENIED拒绝 2.如果checkSelfPermission（）返回值为 PERMISSION_DENIED，那么这时候，我们需要调用ActivityCompat.shouldShowRequestPermissionRationale（Activity activity, String permission）方法，来检测是否需要展示请求权限的弹框。file:///C:/Users/yuqiqi/Documents/My%20Knowledge/temp/1667869a-3f85-43a9-9ea1-a244b031472b_4_files/e97a15a3-135a-4ce2-b211-e4cf5bbd853a.png
官方已经说的很清楚了：

MainActivity AppCompatActivity {
= = (Bundle savedInstanceState) {
.onCreate(savedInstanceState)setContentView(R.layout.)}
(View view) {
askPermisssion()() {
Intent intent = Intent()intent.setAction(Intent.)intent.setData(Uri.())startActivity(intent)} {
Toast.(MainActivity.Toast.).show()}
}
() {
permissionCheck = ContextCompat.(MainActivity.Manifest.permission.)(permissionCheck == PackageManager.) {
(ActivityCompat.(MainActivity.Manifest.permission.)) {
Log.()ActivityCompat.(MainActivity.String[]{Manifest.permission.})} {
Log.()ActivityCompat.(MainActivity.String[]{Manifest.permission.})}
}
}
(requestCodeString[] permissions[] grantResults) {
(requestCode) {
: {
(grantResults.> && grantResults[] == PackageManager.) {
= } {
= }
}
}
}
(View view) {
Toast.(Toast.).show()}
}

复制代码

@RuntimePermissionspublic class MainActivity extends AppCompatActivity { private Button mBt; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mBt = (Button) findViewById(R.id.bt); } public void onClick(View view){ MainActivityPermissionsDispatcher.callPhoneWithCheck(MainActivity.this); } @NeedsPermission(Manifest.permission.CALL_PHONE) void callPhone(){ Intent intent = new Intent(); intent.setAction(Intent.ACTION_CALL); intent.setData(Uri.parse("tel://110")); startActivity(intent); } }
buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:1.3.0' classpath 'com.neenbedankt.gradle.plugins:android-apt:1.7' classpath 'com.jakewharton.sdkmanager:gradle-plugin:0.12.0' classpath 'com.novoda:bintray-release:0.3.4' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files }} allprojects { repositories { jcenter() }} task clean(type: Delete) { delete rootProject.buildDir}
apply plugin: 'com.android.application'
apply plugin: 'android-apt'
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultConfig {
applicationId "com.itheima.call3"
minSdkVersion 21
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.0'
compile 'com.android.support:design:23.1.0'
compile 'com.github.hotchemi:permissionsdispatcher:1.2.1@aar'
apt 'com.github.hotchemi:permissionsdispatcher-processor:1.2.1'
}

复制代码

Permission Group	Permissions
android.permission-group.CALENDAR	android.permission.READ_CALENDAR android.permission.WRITE_CALENDAR
android.permission-group.CAMERA	android.permission.CAMERA
android.permission-group.CONTACTS	android.permission.READ_CONTACTS android.permission.WRITE_CONTACTS android.permission.GET_ACCOUNTS
android.permission-group.LOCATION	android.permission.ACCESS_FINE_LOCATION android.permission.ACCESS_COARSE_LOCATION
android.permission-group.MICROPHONE	android.permission.RECORD_AUDIO
android.permission-group.PHONE	android.permission.READ_PHONE_STATE android.permission.CALL_PHONE android.permission.READ_CALL_LOG android.permission.WRITE_CALL_LOG com.android.voicemail.permission.ADD_VOICEMAIL android.permission.USE_SIP android.permission.PROCESS_OUTGOING_CALLS
android.permission-group.SENSORS	android.permission.BODY_SENSORS
android.permission-group.SMS	android.permission.SEND_SMS android.permission.RECEIVE_SMS android.permission.READ_SMS android.permission.RECEIVE_WAP_PUSH android.permission.RECEIVE_MMS android.permission.READ_CELL_BROADCASTS
android.permission-group.STORAGE	android.permission.READ_EXTERNAL_STORAGE android.permission.WRITE_EXTERNAL_STORAGE