[app]Android打开系统APP

打开 Camera

private void launchCamera() {
    Intent intent = new Intent();
    intent.setAction(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA);
    startActivity(intent);
}

打开 Gallery

private void launchGallery() {
    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setType("image/*");
    //intent.setData(Uri.parse("content://media/external/images/media"));
    startActivity(intent);
}

打开 Music

private void launchMusic() {
    Intent intent = new Intent();
    intent.setAction(MediaStore.INTENT_ACTION_MUSIC_PLAYER);
    startActivity(intent);
}
//或
private void launchMusic() {
    startActivity(Intent.makeMainSelectorActivity(Intent.ACTION_MAIN, Intent.CATEGORY_APP_MUSIC));
}

打开 Video

private void launchVideo() {
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    intent.setType("video/*");
    startActivity(intent);
}

打开 Settings

private void launchSettings() {
    Intent intent = new Intent();
    intent.setAction(Settings.ACTION_SETTINGS);
    startActivity(intent);
}

抽离公共部分

private void launchApp(String action, String type, String category) {
    Intent intent = new Intent(action);
    if (null != type) {
        intent.setType(type);
    }
    if (null != category && !intent.hasCategory(category)) {
        intent.addCategory(category);
    }
    startActivity(intent);
}

打开设置子项界面

Android开发中调用系统设置界面