[英]Android Manifest File | Error with every Class
这是我的Android清单文件。 我最近开始继续我的工作,但在每堂课中,几乎所有方法都不起作用。 我开始检查我的Android清单文件,并为每个android:name =“”的错误结果。 这是什么意思,我该如何解决?
`
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher_mt"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_mt_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".StartHome" //Error ---> ... not assignable to android.app.activity
android:label="@string/title_activity_start_home"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".NavDrawer"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Inton"
android:label="@string/title_activity_inton"
android:theme="@style/AppTheme.NoActionBar">
</activity>
<activity android:name=".Tuner">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity
android:name=".Metronome"
android:label="@string/title_activity_metronome"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".Stats"
android:label="@string/title_activity_stats"
android:theme="@style/AppTheme.NoActionBar"></activity>
</application>
`
对于版本23+,我在主要活动中使用它
private static final int REQUEST= 112;
Context mContext = this;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Build.VERSION.SDK_INT >= 23)
{
String[] PERMISSIONS = {android.Manifest.permission.INTERNET,
android.Manifest.permission.READ_EXTERNAL_STORAGE,
android.Manifest.permission.WRITE_EXTERNAL_STORAGE
};
if (!hasPermissions(mContext, PERMISSIONS))
{
ActivityCompat.requestPermissions((Activity) mContext, PERMISSIONS, REQUEST );
}
else
{
callNextActivity();
}
}
else
{
callNextActivity();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)
{
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode)
{
case REQUEST:
{
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
{
callNextActivity();
}
else
{
Toast.makeText(mContext, "PERMISSIONS Denied", Toast.LENGTH_LONG).show();
}
}
}
}
private static boolean hasPermissions(Context context, String... permissions)
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null)
{
for (String permission : permissions)
{
if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED)
{
return false;
}
}
}
return true;
}
public void callNextActivity()
{
Intent ss = new Intent(MainActivity.this, MainProgram.class);
ss.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
ss.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
ss.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
ss.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivity(ss);
finish();
}
这部分
android.Manifest.permission.READ_EXTERNAL_STORAGE,
android.Manifest.permission.WRITE_EXTERNAL_STORAGE
是我向用户请求权限的地方,如果我也想要摄像头权限,我也会这样输入:
android.Manifest.permission.READ_EXTERNAL_STORAGE,
android.Manifest.permission.WRITE_EXTERNAL_STORAGE,
android.Manifest.permission.CAMERA
然后,如果所有权限都授予,我就调用下一个活动
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)
{
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode)
{
case REQUEST:
{
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
{
callNextActivity();
}
else
{
Toast.makeText(mContext, "PERMISSIONS Denied", Toast.LENGTH_LONG).show();
}
}
}
}
如果所有权限都被磨碎,它将进入IF并调用该函数以授予的权限开始下一个活动。
对于清单:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
请记住,代码适用于23+清单22或更低的清单,因此同时拥有它们将是一件好事
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