add request storage permission example

Author: halzhang

PermissionExample/app/build.gradle

@@ -20,8 +20,9 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile fileTree(include: ['*.jar'], dir: 'libs')
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:23.1.1'
     compile 'com.android.support:design:23.1.1'
+    compile 'org.apache.commons:commons-io:1.3.2'
 }

PermissionExample/app/src/main/AndroidManifest.xml

@@ -24,6 +24,7 @@
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 
+    <!-- 只在23以上版本并请求了授权后有效 -->
     <uses-permission-sdk-23 android:name="android.permission.CALL_PHONE"/>
 
 </manifest>

PermissionExample/app/src/main/java/com/halzhang/android/examples/permissionexample/MainActivity.java

@@ -1,16 +1,33 @@
 package com.halzhang.android.examples.permissionexample;
 
+import android.Manifest;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
+import android.os.Environment;
 import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.Snackbar;
+import android.support.v4.app.ActivityCompat;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
-import android.view.View;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
+import android.widget.Button;
+
+import org.apache.commons.io.FileUtils;
+
+import java.io.File;
 
 public class MainActivity extends AppCompatActivity {
 
+    private static final int REQUEST_STORAGE = 1;
+    private static final String[] STORAGE_PERMISSION = {Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE};
+
+
+    private Button mStorageBtn;
+    private Button mPhoneBtn;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -26,6 +43,58 @@ public void onClick(View view) {
                         .setAction("Action", null).show();
             }
         });
+        mStorageBtn = (Button) findViewById(R.id.btn_storage);
+        mStorageBtn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                writeFile();
+            }
+        });
+        mPhoneBtn = (Button) findViewById(R.id.btn_phone);
+
+    }
+
+    private void writeFile() {
+        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
+                || ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
+            //未授权，请求权限
+            requestStoragePermission();
+        } else {
+            File file = new File(Environment.getExternalStorageDirectory(), "temp.txt");
+            try {
+                FileUtils.writeStringToFile(file, "Hello Runtime Permission");
+                Log.i("PermissionExample", "Write file success!");
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void requestStoragePermission() {
+        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
+                || ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_EXTERNAL_STORAGE)) {
+            Snackbar.make(mStorageBtn, "请求存储权限", Snackbar.LENGTH_LONG).setAction(android.R.string.ok, new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    ActivityCompat.requestPermissions(MainActivity.this, STORAGE_PERMISSION, REQUEST_STORAGE);
+                }
+            }).show();
+        } else {
+            ActivityCompat.requestPermissions(this, STORAGE_PERMISSION, REQUEST_STORAGE);
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        if (requestCode == REQUEST_STORAGE) {
+            if (Utils.verifyPermission(grantResults)) {
+                Snackbar.make(mStorageBtn, "授权成功", Snackbar.LENGTH_LONG).show();
+                writeFile();
+            } else {
+                Snackbar.make(mStorageBtn, "授权失败", Snackbar.LENGTH_LONG).show();
+            }
+        }
     }
 
     @Override

PermissionExample/app/src/main/java/com/halzhang/android/examples/permissionexample/Utils.java

@@ -0,0 +1,28 @@
+package com.halzhang.android.examples.permissionexample;
+
+import android.content.pm.PackageManager;
+
+/**
+ * Created by HalZhang on 2016/1/12.
+ */
+public class Utils {
+
+    /**
+     * 多权限授权结果校验
+     *
+     * @param grantResults
+     * @return
+     */
+    public static boolean verifyPermission(int[] grantResults) {
+        if (grantResults.length < 1) {
+            return false;
+        }
+        for (int result : grantResults) {
+            if (result != PackageManager.PERMISSION_GRANTED) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+}

PermissionExample/app/src/main/res/layout/content_main.xml

@@ -1,10 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
+<LinearLayout
     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"
+    android:orientation="vertical"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
@@ -17,4 +18,16 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Hello World!"/>
-</RelativeLayout>
+
+    <Button
+        android:id="@+id/btn_storage"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="storage"/>
+
+    <Button
+        android:id="@+id/btn_phone"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="phone"/>
+</LinearLayout>