android動态申請權限模闆

第一步：

建立一個檢查權限的工具類：

public class PermissionsChecker {
    private final Context mContext;

    public PermissionsChecker(Context context) {
        mContext = context.getApplicationContext();
    }

    // 判斷權限集合
    public boolean lacksPermissions(String... permissions) {
        for (String permission : permissions) {
            if (lacksPermission(permission)) {
                return true;
            }
        }
        return false;
    }

    // 判斷是否缺少權限
    private boolean lacksPermission(String permission) {
        return ContextCompat.checkSelfPermission(mContext, permission) ==
                PackageManager.PERMISSION_DENIED;
    }
}      

第二步：

擷取權限界面：

public class PermissionsActivity extends AppCompatActivity {

    public static final int PERMISSIONS_GRANTED = 0; // 權限授權
    public static final int PERMISSIONS_DENIED = 1; // 權限拒絕

    private static final int PERMISSION_REQUEST_CODE = 0; // 系統權限管理頁面的參數
    private static final String EXTRA_PERMISSIONS =
            "me.chunyu.clwang.permission.extra_permission"; // 權限參數
    private static final String PACKAGE_URL_SCHEME = "package:"; // 方案

    private PermissionsChecker mChecker; // 權限檢測器
    private boolean isRequireCheck; // 是否需要系統權限檢測, 防止和系統提示框重疊

    // 啟動目前權限頁面的公開接口
    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需要使用靜态startActivityForResult方法啟動!");
        }
        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); // 請求權限
            } else {
                allPermissionsGranted(); // 全部權限都已擷取
            }
        } else {
            isRequireCheck = true;
        }
    }

    // 傳回傳遞的權限參數
    private String[] getPermissions() {
        return getIntent().getStringArrayExtra(EXTRA_PERMISSIONS);
    }

    // 請求權限相容低版本
    private void requestPermissions(String... permissions) {
        ActivityCompat.requestPermissions(this, permissions, PERMISSION_REQUEST_CODE);
    }

    // 全部權限均已擷取
    private void allPermissionsGranted() {
        setResult(PERMISSIONS_GRANTED);
        finish();
    }

    /**
     * 使用者權限處理,
     * 如果全部擷取, 則直接過.
     * 如果權限缺失, 則提示Dialog.
     *
     * @param requestCode  請求碼
     * @param permissions  權限
     * @param grantResults 結果
     */
    @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();
        }
    }

    // 含有全部的權限
    private boolean hasAllPermissionsGranted(@NonNull int[] grantResults) {
        for (int grantResult : grantResults) {
            if (grantResult == PackageManager.PERMISSION_DENIED) {
                return false;
            }
        }
        return true;
    }

    // 顯示缺失權限提示
    private void showMissingPermissionDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(PermissionsActivity.this);
        builder.setTitle(R.string.help);
        builder.setMessage(R.string.string_help_text);

        // 拒絕, 退出應用
        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();
    }

    // 啟動應用的設定
    private void startAppSettings() {
        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        intent.setData(Uri.parse(PACKAGE_URL_SCHEME + getPackageName()));
        startActivity(intent);
    }
}      

第三步：string.xml中的内容：

<resources>
    <string name="app_name">此應用</string>
    <string name="permission">權限(permission)</string>
    <string name="no_permissions">應用需要必要的運作權限</string>

    <string name="settings">設定</string>
    <string name="help">幫助</string>
    <string name="string_help_text">目前應用缺少必要權限。\n\n請點選\"設定\"-\"權限\"-打開所需權限。\n\n最後點選兩次後退按鈕，即可傳回。</string>
    <string name="quit">退出</string>
</resources>      

第四步：

建立擷取權限的界面

activity_permissions.xml

<?xml version="1.0" encoding="utf-8"?>
<View
    android:id="@+id/image"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_weight="1"
    android:adjustViewBounds="true"
    android:background="#88888888"
    android:contentDescription="@null"/>
      

第五步：

在入口處：加入需要擷取的權限：

private static final int REQUEST_CODE = 0; // 請求碼

// 所需的全部權限
static final String[] PERMISSIONS = new String[]{
        Manifest.permission.RECORD_AUDIO,
        Manifest.permission.MODIFY_AUDIO_SETTINGS
};

private PermissionsChecker mPermissionsChecker; // 權限檢測器      

檢查權限入口：

mPermissionsChecker = new PermissionsChecker(this);
// 缺少權限時, 進入權限配置頁面
if (mPermissionsChecker.lacksPermissions(PERMISSIONS)) {
    startPermissionsActivity();
}