英文:
Why My broadcast receiver is not responding to any of the phone state?
问题
我需要翻译的部分如下：
"Actually, I want a broadcast receiver that can read the phone state like calling, OFFHOOK, idle.
here is my code.
I have added the <uses-permission> for reading Phone State in Manifest file
Here is my Statically registered Receiver
This is the MainActivity.Java
package com.example.callstateapp;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
CallStateBroadcast myReceiver = new CallStateBroadcast();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(TelephonyManager.EXTRA_STATE);
registerReceiver(myReceiver,intentFilter);
}
}
This is CallStateBroadcast.Class
package com.example.callstateapp;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.TelephonyManager;
import android.widget.Toast;
public class CallStateBroadcast extends BroadcastReceiver {
Context mContext;
@Override
public void onReceive(final Context context, Intent intent)
{
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
if (state.equals(TelephonyManager.EXTRA_STATE_RINGING))
Toast.makeText(context, "Ringing...", Toast.LENGTH_SHORT).show();
if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK))
Toast.makeText(context, "Busy...", Toast.LENGTH_SHORT).show();
if (state.equals(TelephonyManager.EXTRA_STATE_IDLE))
Toast.makeText(context, "Free...", Toast.LENGTH_SHORT).show();
}
}"
请注意，以上内容已经翻译成中文。
英文:
Actually, I want a broadcast receiver that can read the phone state like calling, OFFHOOK, idle.
here is my code.
I have added the <uses-permission> for reading Phone State in Manifest file
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
Here is my Statically registered Receiver
<receiver android:name=".CallStateBroadcast">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE"/>
</intent-filter>
</receiver>
This is the MainActivity.Java
package com.example.callstateapp;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
CallStateBroadcast myReceiver = new CallStateBroadcast();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(TelephonyManager.EXTRA_STATE);
registerReceiver(myReceiver,intentFilter);
}
}
This is CallStateBroadcast.Class
package com.example.callstateapp;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.TelephonyManager;
import android.widget.Toast;
public class CallStateBroadcast extends BroadcastReceiver {
Context mContext;
@Override
public void onReceive(final Context context, Intent intent)
{
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
if (state.equals(TelephonyManager.EXTRA_STATE_RINGING))
Toast.makeText(context, "Ringing...", Toast.LENGTH_SHORT).show();
if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK))
Toast.makeText(context, "Busy...", Toast.LENGTH_SHORT).show();
if (state.equals(TelephonyManager.EXTRA_STATE_IDLE))
Toast.makeText(context, "Free...", Toast.LENGTH_SHORT).show();
}
}
答案1
得分: 1
您需要在应用程序启动时至少注册一次接收器类。您可以在您的 `MainActivity.java` 文件中添加以下代码，它将起作用。
**MainActivity.java**
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CallStateBroadcast myReceiver = new CallStateBroadcast();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(TelephonyManager.EXTRA_STATE);
registerReceiver(myReceiver, intentFilter);
}
**CallStateBroadcast.java**
public class CallStateBroadcast extends BroadcastReceiver {
Context mContext;
@Override
public void onReceive(final Context context, Intent intent) {
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
Log.e("Zed", "ringing");
Toast.makeText(context, "Ringing...", Toast.LENGTH_SHORT).show();
}
if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)) {
Log.e("Zed", "offhook");
Toast.makeText(context, "Busy...", Toast.LENGTH_SHORT).show();
}
if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)) {
Log.e("Zed", "idle");
Toast.makeText(context, "Free...", Toast.LENGTH_SHORT).show();
}
}
}
**AndroidManifest.xml**
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapplication">
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
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>
<receiver android:name=".CallStateBroadcast">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE"/>
</intent-filter>
</receiver>
</application>
</manifest>
Edit
我已经为您检查了示例项目的代码。MinSdk 版本为 21，TargetSdk 版本为 30。
以下是工作录像：https://i.stack.imgur.com/wqqqO.gif
<details>
<summary>英文:</summary>
You need to register your receiver class at least once when your application starts. You can add this in your `MainActivity.java` file and it will work.
**MainActivity.java**
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CallStateBroadcast myReceiver = new CallStateBroadcast();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(TelephonyManager.EXTRA_STATE);
registerReceiver(myReceiver,intentFilter);
}
**CallStateBroadcast.java**
public class CallStateBroadcast extends BroadcastReceiver {
Context mContext;
@Override
public void onReceive(final Context context, Intent intent)
{
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
Log.e("Zed", "ringing");
Toast.makeText(context, "Ringing...", Toast.LENGTH_SHORT).show();
}
if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)) {
Log.e("Zed", "offhook");
Toast.makeText(context, "Busy...", Toast.LENGTH_SHORT).show();
}
if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)) {
Log.e("Zed", "idle");
Toast.makeText(context, "Free...", Toast.LENGTH_SHORT).show();
}
}
}
**AndroidManifest.xml**
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapplication">
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
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>
<receiver android:name=".CallStateBroadcast">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE"/>
</intent-filter>
</receiver>
</application>
</manifest>
**Edit**
I uploaded my sample project code for you to check. MinSdk version 21, TargetSdk 30.
Here is the recording of working. https://i.stack.imgur.com/wqqqO.gif
</details>
# 答案2
**得分**: 0
使用READ_PHONE_STATE权限，您需要：
注意：如果您的minSdkVersion和targetSdkVersion值都设置为3或更低，系统会隐式授予您的应用此权限。如果您不需要此权限，请确保您的targetSdkVersion为4或更高。
然后，您需要指定：
```xml
<uses-sdk
android:minSdkVersion="20"
android:targetSdkVersion="您想要的版本" />
英文:
To use READ_PHONE_STATE you need:
Note: If both your minSdkVersion and targetSdkVersion values are set to 3 or lower, the system implicitly grants your app this permission. If you don't need this permission, be sure your targetSdkVersion is 4 or higher.
Then, you need to specify:
<uses-sdk
android:minSdkVersion="20"
android:targetSdkVersion="whatyouwant" />
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