Java 如何调用活动';从一个单独的类中删除方法
所以我一直在玩安卓M风格的权限,只要我在MainActivity中做任何事情,我就有一个可用的演示。我觉得它看起来很麻烦,想把它分成多个文件,这样看起来更干净,维护起来也更容易 问题是,通过将权限检查移动到它自己的文件中,我现在很难让权限检查器返回MainActivity并启动demo()方法。在PermissionsChecker.java的第73行和第114行,我需要调用main activities demo方法Java 如何调用活动';从一个单独的类中删除方法,java,android,Java,Android,所以我一直在玩安卓M风格的权限,只要我在MainActivity中做任何事情,我就有一个可用的演示。我觉得它看起来很麻烦,想把它分成多个文件,这样看起来更干净,维护起来也更容易 问题是,通过将权限检查移动到它自己的文件中,我现在很难让权限检查器返回MainActivity并启动demo()方法。在PermissionsChecker.java的第73行和第114行,我需要调用main activities demo方法 package me.johnweland.androidrtp; imp
package me.johnweland.androidrtp;
import android.Manifest;
import android.annotation.TargetApi;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.os.Build;
import java.util.ArrayList;
import java.util.List;
/**
* Created by jweland on 12/11/2015.
*/
public class PermissionChecker {
private static final String TAG = PermissionChecker.class.getSimpleName();
final private int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 0;
private MainActivity mainActivity;
private static PermissionChecker instance = null;
private PermissionChecker(MainActivity activity) {
mainActivity = activity;
}
static public PermissionChecker getInstance(MainActivity activity) {
if (instance == null) {
instance = new PermissionChecker(activity);
return instance;
} else {
return instance;
}
}
@TargetApi(Build.VERSION_CODES.M)
protected void permissionsCheck(){
List<String> permissionsNeeded = new ArrayList<String>();
final List<String> permissionsList = new ArrayList<String>();
// Add permission check for any permission that is not NORMAL_PERMISSIONS
if(!addPermission(permissionsList, Manifest.permission.RECORD_AUDIO))
permissionsNeeded.add(mainActivity.getString(R.string.permission_microphone));
if(!addPermission(permissionsList, Manifest.permission.CAMERA))
permissionsNeeded.add(mainActivity.getString(R.string.permission_camera));
if(permissionsList.size() > 0) {
if(permissionsNeeded.size() > 0) {
// Need Rationale
String message = mainActivity.getString(R.string.permission_grant_message) + permissionsNeeded.get(0);
for (int i = 1; i < permissionsNeeded.size(); i++)
message = message + "\n" +permissionsNeeded.get(i);
showMessageOKCancel(message,
new DialogInterface.OnClickListener() {
@TargetApi(Build.VERSION_CODES.M)
@Override
public void onClick(DialogInterface dialog, int which) {
mainActivity.requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
}
});
return;
}
mainActivity.requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
return;
}
mainActivity.demo();
}
private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) {
new AlertDialog.Builder(mainActivity)
.setMessage(message)
.setPositiveButton(R.string.dialog_ok_button_text, okListener)
.setNegativeButton(R.string.dialog_cancel_button_text, null)
.create()
.show();
}
@TargetApi(Build.VERSION_CODES.M)
private boolean addPermission(List<String> permissionsList, String permission) {
if (mainActivity.checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
permissionsList.add(permission);
// Check for Rationale Option
if (!mainActivity.shouldShowRequestPermissionRationale(permission))
return false;
}
return true;
}
}
注意:我关注Android权限
我也发现了这些问题&。我意识到这是危险的接近复制的前两个,他们让我接近,但我还没有完全能够得到它。如果有人能为我详细介绍一下,我对Java和Android还是相当陌生的
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest package="me.johnweland.androidrtp"
xmlns:android="http://schemas.android.com/apk/res/android">
<!-- // Permissions -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAMERA" />
<!-- // Features -->
<uses-feature android:name="android.hardware.camera" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
MainActivity.java
package me.johnweland.androidrtp;
import android.Manifest;
import android.annotation.TargetApi;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import java.util.HashMap;
import java.util.Map;
public class MainActivity extends AppCompatActivity {
final private int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Build.VERSION.SDK_INT >= 23) {
// Marshmallow+
PermissionChecker permissions = PermissionChecker.getInstance(this);
permissions.permissionsCheck();
} else {
// Pre-Marshmallow
demo();
}
}
@TargetApi(Build.VERSION_CODES.M)
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS:
{
Map<String, Integer> perms = new HashMap<String, Integer>();
// Initial
perms.put(Manifest.permission.RECORD_AUDIO, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.CAMERA, PackageManager.PERMISSION_GRANTED);
// Fill with results
for (int i = 0; i < permissions.length; i++)
perms.put(permissions[i], grantResults[i]);
// Check for RECORD_AUDIO
if (perms.get(Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED
&& perms.get(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
// All Permissions Granted
demo();
}
else {
// Permission Denied
Toast.makeText(this, R.string.permission_denied_message, Toast.LENGTH_SHORT).show();
}
}
break;
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
protected void demo() {
Toast.makeText(this, "Demo toast", Toast.LENGTH_LONG).show();
}
}
包me.johnwelland.androidrtp;
导入android.Manifest;
导入android.annotation.TargetApi;
导入android.content.pm.PackageManager;
导入android.os.Build;
导入android.support.v7.app.AppActivity;
导入android.os.Bundle;
导入android.widget.Toast;
导入java.util.HashMap;
导入java.util.Map;
公共类MainActivity扩展了AppCompatActivity{
最终私有整数请求\代码\请求\多个权限=0;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
如果(Build.VERSION.SDK_INT>=23){
//棉花糖+
PermissionChecker permissions=PermissionChecker.getInstance(此);
permissions.permissionsCheck();
}否则{
//前棉花糖
演示();
}
}
@TargetApi(Build.VERSION\u CODES.M)
public void onRequestPermissionsResult(int-requestCode、字符串[]权限、int[]grantResults){
开关(请求代码){
案例请求\代码\请求\多个权限:
{
Map perms=new HashMap();
//首字母
perms.put(Manifest.permission.RECORD_AUDIO,PackageManager.permission_provided);
perms.put(Manifest.permission.CAMERA,PackageManager.permission_provided);
//满载而归
for(int i=0;i
PermissionsChecker.java
package me.johnweland.androidrtp;
import android.Manifest;
import android.annotation.TargetApi;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.os.Build;
import java.util.ArrayList;
import java.util.List;
/**
* Created by jweland on 12/11/2015.
*/
public class PermissionChecker {
private static final String TAG = PermissionChecker.class.getSimpleName();
final private int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 0;
private MainActivity mainActivity;
private static PermissionChecker instance = null;
private PermissionChecker(MainActivity activity) {
mainActivity = activity;
}
static public PermissionChecker getInstance(MainActivity activity) {
if (instance == null) {
instance = new PermissionChecker(activity);
return instance;
} else {
return instance;
}
}
@TargetApi(Build.VERSION_CODES.M)
protected void permissionsCheck(){
List<String> permissionsNeeded = new ArrayList<String>();
final List<String> permissionsList = new ArrayList<String>();
// Add permission check for any permission that is not NORMAL_PERMISSIONS
if(!addPermission(permissionsList, Manifest.permission.RECORD_AUDIO))
permissionsNeeded.add(mainActivity.getString(R.string.permission_microphone));
if(!addPermission(permissionsList, Manifest.permission.CAMERA))
permissionsNeeded.add(mainActivity.getString(R.string.permission_camera));
if(permissionsList.size() > 0) {
if(permissionsNeeded.size() > 0) {
// Need Rationale
String message = mainActivity.getString(R.string.permission_grant_message) + permissionsNeeded.get(0);
for (int i = 1; i < permissionsNeeded.size(); i++)
message = message + "\n" +permissionsNeeded.get(i);
showMessageOKCancel(message,
new DialogInterface.OnClickListener() {
@TargetApi(Build.VERSION_CODES.M)
@Override
public void onClick(DialogInterface dialog, int which) {
mainActivity.requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
}
});
return;
}
mainActivity.requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
return;
}
mainActivity.demo();
}
private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) {
new AlertDialog.Builder(mainActivity)
.setMessage(message)
.setPositiveButton(R.string.dialog_ok_button_text, okListener)
.setNegativeButton(R.string.dialog_cancel_button_text, null)
.create()
.show();
}
@TargetApi(Build.VERSION_CODES.M)
private boolean addPermission(List<String> permissionsList, String permission) {
if (mainActivity.checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
permissionsList.add(permission);
// Check for Rationale Option
if (!mainActivity.shouldShowRequestPermissionRationale(permission))
return false;
}
return true;
}
}
包me.johnwelland.androidrtp;
导入android.Manifest;
导入android.annotation.TargetApi;
导入android.app.AlertDialog;
导入android.content.DialogInterface;
导入android.content.pm.PackageManager;
导入android.os.Build;
导入java.util.ArrayList;
导入java.util.List;
/**
*由jweland于2015年11月12日创建。
*/
公共类许可证检查器{
私有静态最终字符串标记=PermissionChecker.class.getSimpleName();
最终私有整数请求\代码\请求\多个权限=0;
私人活动;
私有静态PermissionChecker实例=null;
私人许可证检查器(主活动){
主要活动=活动;
}
静态公共权限检查器getInstance(MainActivity活动){
if(实例==null){
实例=新的PermissionChecker(活动);
返回实例;
}否则{
返回实例;
}
}
@TargetApi(Build.VERSION\u CODES.M)
受保护的无效许可证SCHECK(){
List permissions need=new ArrayList();
最终列表权限列表=新的ArrayList();
//为任何非正常权限添加权限检查\u权限
if(!addPermission(permissionsList,Manifest.permission.RECORD_AUDIO))
permissionseeded.add(mainActivity.getString(R.string.permission_));
if(!addPermission(permissionsList,Manifest.permission.CAMERA))
permissionseeded.add(mainActivity.getString(R.string.permission_-camera));
如果(permissionsList.size()>0){
如果(PermissionsNeed.size()>0){
//需要理由
String message=mainActivity.getString(R.String.permission\u grant\u message)+permissionsNeed.get(0);
对于(inti=1;i